Delphi shellexecute wait for process to finish. 45 Getting output from a shell/dos app into a Delphi app.
Delphi shellexecute wait for process to finish Creating processes, and waiting for them to terminate is routine stuff on all platforms. To get App1's process handle, use OpenProcess() with GetCurrentProcessId() as the process ID, or DuplicateHandle() with GetCurrentProcess() as the source handle. I tried to use the code bellow but How to wait for a process to finish C++. Sometimes, you need to wait for a thread to finish some operation rather than waiting for a particular thread to complete execution. ShellExecuteEx() can wait on the openas verb to finish running the dialog (via the SEE_MASK_NOASYNC flag), but there is nothing to tell the dialog to wait for the launched app to exit before returning control to ShellExecuteEx(). Often times, it's hard to find the process that is used to view the file, and even if you can, there's no certainty the closing the view of the file will close the process. delphi; pdf; printing; shellexecute; Share. 20. SyncObjs. This method returns immediately if the subprocess has already terminated. Commented Aug 20, 2015 at 20:36 Use CreateProcess to start the process and set up the pipes yourself. Note: > /dev/null 2>&1 & as seen in other answers is a terse form of > /dev/null 2>/dev/null & given This is a short function that will run another program as if from the command line, wait for it to finish, and return the process's exit code. Modified 3 years, 7 months ago. @RemyLebeau that was one of the first things i tried :) usage of flag CMIC_MASK_NOASYNC seems to be merely a suggestion to the implementation, my application did not once wait for IContextMenu::InvokeCommand to finish. Handle implies a window handle. You don't need to create a process that creates Does PHP still wait for the process to finish before continuing execution, or does it fire and forget? – Alana Storm. This works but not in the right order. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company What I'm wanting to do is to hand it a command from within a Delphi app to execute some arbitrary CmdLet and get status information back from it while it's executing the script (otherwise I'd make do with doing a ShellExecute on it). ProcessMessages or UpdateWindow(Handle) (to update the form) and increment a progressbar during your time_consuming_method. Follow where the default is to use ShellExecute. I would like to be able to have the VBA application wait for the console application to complete as well as retreive the exit code from the console application. im creating this kind of program where their is RichEdit and two buttons (1st button: Refresh, 2nd button: Open As). exe uses ShellExecute(runas) => (which gives) App. Follow That kind of long-running activity shouldn't be performed in the main GUI loop anyway. Based on this answer by @Magoo which didn't work for me, but put me on the right track. You need to tell the run to wait until the process is finished. App2 needs to wait on App1's process handle instead. No need for a workaround. It's possible I guess, but it's not the best way to do this. Emails en printed attachments get mixed-up. It is called ExecuteAndWait. Run a process as a synchronous operation from a Win32 application. If that option is disabled (the default setting), ShellExecute uses an open Explorer window rather than launch a new one. Hi, I am automating the Adobe acrobat reader to print a file through a set of command line parameters. When/if you have a HANDLE hProcess then I expect you can pass it as a parameter it to the TerminateProcess function: which you would call (to terminate the child process) before your application stops. I am currently using ShellExecute to invoke the command line parameters, but the problem is that I need to halt my application until the acrobat reader is finished printing. It is apparently based on the trick of prefixing a class guid string with the "Elevation:Administrator!new:" prefix when normally hidden code internally calls CoGetObject:function CoGetObject(pszName: PWideChar; pBindOptions: How to use ShellExecute functions in Delphi to launch programs and files from your code. Follow edited Aug 16, 2016 at 8:27. If you have code that blocks the GUI, you can use a background thread and an event to provide a non blocking timer. This also offers the advantage that you can collect all the results in one place once the processing is finished More information here. I tryed with ShellExecuteEx with the nescessary options set but this steals the focus anyhow. 1 How to ShellExecute a program AND THEN send it command line text Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; ShellExecute/Ex() with the "runas" verb is the only official way to start an elevated process programmably, especially if the executable being run does not have its own UAC manifest to invoke elevation. The problem is that shell_exec() in the queue runner script calls the processing scripts, but then doesn't wait for them to finish, resulting in the queue not being completed. You should use a wait function. Note: There is no "CoCreateInstanceAsAdmin" API call. You leak the process handle. exe', nil, nil, SW_SHOWNORMAL); Writeln('Finished'); Try ShellExecuteEx instead, which can return a HANDLE hProcess of the newly-started process. console-application; shellexecute; delphi-5; Share. Commented Mar 12, 2014 at 23:22. Or if you must wait in the main thread, and must use ProcessMessages, use MsgWaitForMultipleObjects. exe so you should add that to the command line. Event objects ( Execute a program and wait until it is done #17. Something like: const DontWaitUntilFinished = false, ShowWindow = 1, DontShowWindow = 0, WaitUntilFinished = true set oShell = WScript. function RunProcess(FileName: string; ShowCmd: DWORD; wait: Boolean; ProcID: PDWORD): Longword; var StartupInfo: TStartupInfo; ProcessInfo: TProcessInformation; begin The simple pattern for task creation and waiting until the work is done is shown by this pseudo code // create a management task task. With WaitForSingleObject you can wait until a process finishes work. Put it in another thread if you want to do something in the meantime. What I want to do is provide a DialogResult ShellExecute(String cmd) similar to ShowDialog() that returns an OK/Cancel(/fail) result, if the user allowed the command to I need to run an exe from within my program, but my program must stop and wait for the . Exec do not mention whether or not the script will wait for the specified process to terminate before the script continues when . If ShellExecuteEx does return a process handle to you, you leak it. Enabled := False; end); // creation of the tasks doing the Go Up to Waiting for Other Threads. This is a little low level and involves a fair amount of Win32 boilerplate. notidaho Using Delphi's ShellExecute() with the process inheriting the original console? 3. , after the Process. I don't know if this is possible to solve with ShellExecuteEx, I've tried to use . e. Obviously CreateProcess returns you a process handle on which you Also, you should probably replace your call to WinExec with one that uses either ShellExecute or createProcess to wait for the spawned process to continue. Back to list of tips; DelphiDabbler. html not registered SE_ERR_NOASSOC (when running from Delphi-Debugger) 1. You are looking to create Is there a way to pause my Delphi plugin and loop or wait until the FileExists returns true before continuing? Pseudocode: Launch form (ShowModal) Form runs exe, manipulates external files Close Form Form released if ExternalFiles exist, do stuff. script a long-running thing, or is it something where it would be okay to launch it and wait for it to finish? cebasso solution with WaitForSingleObject is the right way to do that, just because it will wait for the end of the process in one single command, without needing a loop and sleep (that will cause some unwanted delays) and also without eating ShellExecute/Ex is a heavyweight call that may have side effects that are either desireable or undesireable. I've been looking, but I've not found a way to run elevated and wait for the process to finish. Delphi 7 - ShellExecute command not working in situations. ShellExecute and Wait. filename: The name of the file to run (EXE, . There's also an 'end' event, maybe different events are emitted for different calls (exec(), spawn()) – CodeManX. You will also Clearly, if Adobe Reader starts running then ShellExecute() did its job correctly. Queue(nil, procedure begin SomeForm. Exit; // Background process keeps running OpenOffice use one process for open multiplicity files just like MS Office. exe and ask cmd. Something like that: procedure TForm1. function RunProcess(FileName: string; ShowCmd: DWORD; wait: Boolean; ProcID: if ShellExecuteEx(@sei) then begin repeat Application. You are clearly looking to call cmd. But with OpenOffice Writer have some problems: function FileIsBusy return false just after first saving file by OpenOffice Writer. Delphi Executing command line command. Using the Code. Ask Question Asked 9 years, 4 months ago. SEInfo. The problem is probably that ShellExecute command works asynchronically from the VBA. Handle,PChar('explore'),PChar(strFolder),nil,nil,SW_SHOWNORMAL); end; Is there a way to also pass this a file name (either the full file name path or just the name + extension) and have the folder open in Windows Explorer but also be highlighted/selected? Thanks Govind. WaitFor doesn't return until the other thread terminates, either by finishing its own Execute method or by terminating due to an exception. exe and use the Task Scheduler API instead. ProcessMessages; GetExitCodeProcess(sei. vbs " & args oShell. exe instead of notepad. Jesse Strachman TIE Commerce--***** TIE COMMERCE Jesse Strachman Is there a similar way to get ShellExecute to wait? vbscript; Share. So, to use this function in Delphi, follow these steps: Include ShellAPI unit: Ensure It let you wait for another process to end. I can't find any example on the Internet ShellExecute returns as soon as the process is created. Make cron job wait till another job finished. In any case, ShellExecute is the wrong function to use here. Improve this question. Yes discards out. Finally as other people have suggested you could You should avoid blocking (synchronous) code in Node wherever possible - it halts your entire program whilst waiting for the child process to finish. join() and pool. And/Or: post a WM_QUIT message to the main thread. How could one wait for ShellExecute to finish it's process and then continue? I have bat-file, that make some operations. Is there any way that I can use something like . You may of course remove the wait part. Process. For example, the following code waits until another thread fills a thread list object before accessing the I have an application with 50 threads that do something and I want my procedure (btnTestClick) to wait until all threads are terminated. If you are seeing it not wait, the process you are launching is likely detaching itself to run in the background in which case the subprocess. This works for code that finishes in a short time for each timer event. The reason to choose Wait until multiple command line processes complete? 0 How to implement "Open With" command using ShellExecuteEx and wait for it to finish? 6 . – Michael. g. Using Delphi's ShellExecute() with the process inheriting the original console? 3 Reading the output file of ShellExecute() in Delphi 2010? Wait before ShellExecute is carried out? 0 Delphi Get return value when running a DOS command using ShellExec. Or use MsgWaitForMultipleObjects to perform a wait that can be interrupted in order to process input events. It is tempting to do so because it is simple to call. How to wait for a process to finish C++. Follow answered Jun 29, 2010 at 13:49. As already explained you must wait for the thread until it has started before calling Terminate otherwise TThread. exe -u user1 -ppassword dbName > TheOutputFile. Execute a program and wait until it has finished. Started is true. – joews. Go Up to Waiting for Other Threads. exe to output with color. Here is how my thread looks like : Yes you are right, i want to open a document. map() to wait because of variation of data input. ShellExecute, ShellExecuteEx, CreateProcess and WinExec are WinAPI functions. Now though, I need to have one of these applications appear in one of my Delphi app forms. You don't want to use ShellExecuteEx since that has far more generality than you need. I have tried using shellexecute but it has no such way of doing it. How do I do this? c#; process; Share. Blank ("") uses the current working directory. close() before p. That function, and its infinitely more usable friend ShellExecuteEx are designed to perform a wide range of shell operations on files. You need to wait until the process handle is signaled. Rather than changing the working directory after cmd. ; That said, there is no point to use cmd here. txt", 1, True, last argument True means that macros will wait for the command to complete before continuing execution. As an example, here's one that I've used from time to time, based on some code posted by Pat Richey to You need to use ShellExecuteEx with SEE_MASK_NOCLOSEPROCESS. You can use CreateProcess or ShellExecuteEx instead. In other words, i need the Shell command first to WAIT until the executable finishes its task, exports the data, and THEN do the next commands to format. So i want to synchronize the printing. ShellExecute(Ex) doesn't wait for the process to end, and hence it can't supply return codes to the caller. ShellExecute doesn't return enough information for you to do that, so you should try CreateProcess This is what I use to have VB wait for process to complete before continuing. It can't report errors properly. 0. join() You can also use barrier It works as for threads, letting you specify a number of process you want to wait on and once this number is reached the barrier free them. I can right-click and run the test. ) And if they start an application, it might finish running before your program gets to run anymore. ShellExecute strApp, strCommand, "", "RunAs", 1 strApp is either cscript. I guess you are used to calling ShellExecute which is more lax. bat file as admin and it works correctly (starts wbAdmin and begins creating a system image). If n is not given, all currently active child processes are waited for, and the return status is zero. TEvent) should be created with global scope so that they can act like signals that are visible to all threads. Here is another article that shows how to Wait for the process to finish. Don't fall It tells you lots of stuff about running exes from Delphi, and more to the point it has a ShellExecute wrapper function called ShellExec which includes a Wait parameter, which you can use to wait for the exe to finish before carrying on. I need to start a process from a C# console app and then allow the console app to finish/end without waiting for the process/thread to finish. Opening files will use the system default editor. Queue runner script: Of course. I believe you might lack the SYNCHRONIZE privilege for the process you want to terminate. exe and wscript. @ECHO OFF notepad. Button. I can't use pool. 6. Yield while waiting for the thread to start, because this This process would (running as the other user) use the runas verb in a ShellExecute to launch the desired application. hProcess, ExitCode) ; until (ExitCode > STILL_ACTIVE) or Execute a program and wait until it has finished. I want to program this delay using the best practices. Excel VBA Wait For Shell to Finish before continuing with script. Its echo. For that I use the ShellExecute function. You want to execute a different executable so do that directly. Thanks. Also, why are you using WideString instead of UnicodeString? – Remy Lebeau There is altough a problem, the ShellExecute does not wait and so this is runing square. However, it is not very flexible. It was offered in some other open forum and works very well for me: The following declarations are needed for the RunShell subroutine:. Procedure OpenMyURL(sUrl: It works great, but ShellExecute doesn't wait until the process is over (the program continues executing lines after that one). Waiting on a TThread object that uses FreeOnTerminate=true is a race condition, as the object could be freed at any moment once its Execute() method has exited. Follow Delphi: ShellExecuteEx to . Side note: If all you want is subprocess. close() either because I still need to use the pool in next iteration of 1st loop. SHELLEXECUTEINFO::hProcess contains the handle to the process invoked. try this sample. The best way is to use CreateProcess. bepe4711 bepe4711 Using Delphi's ShellExecute() with the process inheriting the original console? 1. It does make it a little simpler to block until the process has finished, should you need to do that. After the document is opened, a script that I have should be run on the There are a number of ways to improve this: Don't use ShellExecute. I've tried with global variable as counter and with WaitForMultipleObjects(threadCount, @threadArr, True, INFINITE); but the procedure never waits for all threads to terminate. Possibly with ShellExecuteEx or CreateProcess. VB script to send emails - Wait until email is send. Use a thread to perform the call to ShellExecuteEx and the subsequent wait, as suggested by Marko. You don't want to replicate ShellExecute because you don't want to use it at all. It is the best way to create and handle a process in Windows. WaitForSingleObject, or a family member. The This is impossible. You can use the process handle to wait for the process to exit. lnk, etc). Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company in my app (Delphi XE10) i want to open a file (RTF) with user's default editor (MSword or OpenOffice writter or else) and be able to close this editor from my app. To terminate the process, you can pass the process handle to TerminateProcess(). Button1Click(Sender: TObject); begin //Starting bat-fi Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company start defaults to creating a new console, so the implicit inheritance of standard handles doesn't occur. Definitely worth seconding everything that @Remy Lebeau said. Have a look at the following article, which explains elevation in detail and offers alternative You may need p. Also, I did address the issue of finding the absolute path. I've tried the code below as a simple test to open notepad (which it does) and to display the result within PAnel1 on my form (which it doesnt). You should do that directly and avoid the middle man. The following example uses To wait on a chain of processes, use a Job object. Call CloseHandle when you have finished with the process handle. Adobe is at fault instead. exe which is the Windows command interpreter. waitFor invocation), the input stream of the now terminated process no longer has any data that can be read. using getmypid() The when it is time to execute it again, check the PID file, if it is stale and the process has finished then run again, else exit without running as the old process is still active. – omegastripes. So your 15s delay is likely due to your thread accidentally blocking a DDE operation until it times out on the other end. In my program, I'd like to wait for the uninstaller to finish. Here client and server Process. Create a new Forms application and put a TMemo component on your form. Once the process has terminated there is nothing that can execute code. So my only chance is ShellExecute but I should be able to get the id of the process created so I can wait until ended. You then wait until the process handle is signaled. StartAndWait starts the function with ShellExecuteEx and waits until the program is finished, IF ShellExecuteEx(@SEInfo) THEN BEGIN REPEAT Application. For your specific case, perhaps it's better to avoid calling schtasks. parameters [optional] Any parameters for the program. That's the command interpreter. Started do; Also you can call TThread. wait for shell script to finish before going to next line with Cron. Unlike ShellExecuteEx, this method does not return any information about the process. Popen + wait example Dor gave won't help. In Core UseShellExecute defaults to false. Start the new process with the sole task of waiting on its parent to terminate, and then do whatever is needed once the parent has terminated. To do so you can wait until the property TThread. We need a function which launches a command-line executable and get its return value. Use ShellExecuteEx. Popen + wait use subprocess. Automate scp file transfer using a shell script. ShellExecute to run a process under standard user from my elevated process, as described in Raymond Chen's article. I did not write this and do not take credit. You can use a Windows "event" synchronization object (which has nothing to do with a Delphi event). ShellExecute(0,nil,'cmd. The following example uses the ShellExecuteEx API function. It's a more involved API, but it will make what you are attempting simpler. If the execution fails (non-0 return value from executable), the return Also, you should probably replace your call to WinExec with one that uses either ShellExecute or createProcess to wait for the spawned process to continue. Event objects (System. Basically: Writeln('Started'); ShellExecute(0, 'open', 'another. Yes, you can do something similar with Delphi. Wait till one program is finished before starting next in Windows Script. I am creating a process with that code: CreateProcess(NULL, "process. Delphi Tips. 45 Getting output from a shell/dos app into a Delphi app. Yes fire and forget – jitter. If you wish to wait for the process to complete, you need to take specific steps to do so. call: Wait for each specified process and return its termination status Each n may be a process ID or a job specification; if a job spec is given, all processes in that job's pipeline are waited for. exe", NULL, NULL, TRUE, 0, NULL, NULL, %ini_processo, %processo_info); I need my code to wait for my process to finish before resuming. But you want to create a process. CreateProcess. start() t1. workingdir [optional] The working directory. Runner. join() t2. wsh file that I create to run a second script. But I need it to wait until the process has been killed at this line: WshShell. Start Trying to detect that the displaying process has closed is brittle and fraught with problems, as you learnt in your previous question. waitFor() blocks the current thread until the process has terminated, at which point the execution control returns to the thread that spawned the process. A slightly better method would be to wrap your time_consuming_method up into a class with an OnProgress event. ProcessMessages; // Damit die There are two obvious ways to avoid that. Exec is used. This did not work, same result as the CreateProcess attempt i made (see UPDATE 1 above). You may be better off writing a process ID file (PID) when the script starts running. . Use CreateProcess instead. It's just some code floating around. This example will add a new line with the I also want to avoid to create a new process and then terminate or things like that. Run you can specify bWaitOnReturn to choose whether or not to wait for the process to terminate before your script continues. 6k 2 2 gold Reading the output file of ShellExecute() in Delphi 2010? 4. Follow asked Jun 20, 2012 at 8:51. So unless you can guarantee that you are calling WaitForSingleObject() before the thread's OnTerminate event is fired, then you are not guaranteed to have a valid object on which to read its Handle property. exe is C:\cygwin\bin\echo. So, create a Job, add the calc. stdin. In this case each child on the left-hand side (the writing side) of the pipe inherits a handle to the pipe, but it's not set as the StandardOutput for the process, and the Wait for a process to finish. This works for me in Windows 10 (1903). You can infer that from the other os. Improve this answer. 2 The bad but easy way to do this is to call Application. 1. How can I make my application wait until the other program has finished before it continues I've often usd the Shell command and 'waited' for it to finish using this technique:- Let lngPID = Shell(strExecutable, vbNormalFocus) Let lngPID = This source code details how to create a process and be notified when it finishes. How to wait for background jobs to finish in shell. CreateProcess waits when Please note, that I don't want to wait for App(N-1) to finish and then start AppN. I'm using the ShellExecuteEx function in a C++ program to launch an Uninstall. I am using ShellExecute to run external application How can i tell when the external application ends ? Here my code theProgram := 'MySql. I was looking into ShellExecuteEx and found that I could get an HINSTANCE which I assume would allow me (setting bWaitOnReturn to true) to have the vbscript wait until the one called finishes, but I don't see how to run in elevated mode using Run. Sql',nil,sw_normal); Another options is use pipes, you can find a very nice Hi, I'm wondering if it's possible to make the "ShellExecute" command to wait until it finishes it's process? This is what I want to do: I have a file that I would like to open in it's associated application (for example like a . Check this out and see my comments inline: var sei: TShellExecuteInfo; exitCode: Cardinal; begin ZeroMemory(@sei, SizeOf(sei)); with sei do begin cbSize := SizeOf(sei); fMask := SEE_MASK_NOCLOSEPROCESS; // Tell ShellExecuteEx to keep the process handle open Getting rid of the evil delay caused by ShellExecute. Don't use it, due to its deprecation. How to run this file from Delphi and wait, until it stops. Nor should waiting for such: While you're waiting for the animation to finish (if you could), the rest of your application will behave like a dead program, i. WinExec is long deprecated and retained only for backwards compatibility reasons. You cannot execute code in a process that has terminated. Make sure the . The information for . Wait for batch file to finish process in Powershell before executing other commands? 1. Caveat: if you use it for a process that is running multiple times, it waits for all of them to finish before continuing. Get ShellExecute to invoke cmd. Load 7 more related questions Show fewer related questions @Charles, you can use the redirector simbol ">" in a ShellExecute, but using the cmd. The busy loop works, but is clumsy. CreateProcess used to be the fundamental way to create a new process, used internally by higher level functions such as ShellExecute. I know how to wait for a Shell process to finish when I use the "Shell" command (not ShellExecute), but in this case I have to use ShellExecute. ShellExecute is not appropriate for spawning a new process because the process is spawned from a DLL loaded from the main application, I have a line of code: objShell. For example by a call to WaitForSingleObject. The Delphi console application in question tries to utilize WinExec to call Cygwin's echo. A long explaination but I found it nescessary. I want to compile a Delphi program from another delphi program, to do this I use ShellExecuteEx so that the program waits until the compiling is done. exe\" -t \"Hourly Check\"" Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The process you're starting is cmd. The following function starts an executable with a given command line. That causes your execution to wait for Windows to finish before it returns after creating the process. At the end of 2nd loop, I want to summarize the result of all processes. it will not respond to the GUI in any way, including resizing, redrawing, closing with the X, etc. If you call cmd with arguments, you should achieve what you want: - procedure TfrmAbout. Wait on this handle using WaitForSingleObject - if you want the caller application to wait till the target application quits. DDE operates on window messages. Any ideas? I tried using WaitForSingleObject, but I can't figure out the syntax, and I don't know what to test for. What is the good way to wait for processes to finish in this case? Instead of 'waiting' for all tasks to finish, you can think in terms of the Hollywood principle, "don't call me, I'll call you" - when I'm finished. exe (running as user + elevated) You need to supply an executable file when you call CreateProcess. To wait for another thread to finish executing, use the WaitFor method of that other thread. SS64's details about . " End If ' Now wait for the process to terminate. App1. ShellExecute is easy to use (high user level). exe REM For the OP's original problem, put drvinst. while not Thread. If you use ShellExecuteEx(), make sure the SEE_MASK_NOCLOSEPROCESS flag is specified so you In Delphi I've used ShellExecute for years to launch (and optionally wait for) other applications. Post date: Sep 24, 2010 1:39:19 AM. You create the event (there's a Delphi TEvent wrapper in SyncObjs, IIRC), and call WaitForSingleObject to wait for that event to become signalled. ErrorStream); process. when i click on the 1st button a data or file will show in the RichEdit and when i click on the 2nd button the user will specify what kind of editor or executable file will he/she wants to use in order to view the process:=RunProgramInBackground('someCommand. 3. cmdLine = The command to execute with all command-line parameters, like \ " \"c:\\Program Files\\Acme\\runcheck. Also note the WaitForSingleObject. Let's see the differences between them. Cygwin is installed under C:\cygwin. In the posted code, once the process has terminated (i. 4. I need to know when the launched process finishes, and I may need its exit code. The 'return value' is the value returned by the function. And obviously close both handles when you are done with them. Run the program and wait for it to terminate before you check for the output file. So how can I let the VBA wait until the ShellExecute has finished. Then tack on stdout handling. This source code details how to create a process and be notified when it finishes. com; Previous Tip; Next Tip; Execute a program and wait until it is done #17. Blank ("") uses none. Step 1 is to get CreateProcess to do the work and not worry about stdout. ("WScript. ShellExecute is used to execute shell verbs. I tried the Shellandwait() _ "Failed to obtain process handle for process with ID " & pid & ". You are not passing the SEE_MASK_NOCLOSEPROCESS flag to ShellExecuteEx(), so it will not return a valid process handle to you, and your loop is ignoring Sometimes, you need to wait for a thread to finish some operation rather than waiting for a particular thread to complete execution. See JclTask in the JCL. I have used this code for years with Delphi 7 and it worked: function Execute(CONST ExeName, Parameters: string): Boolean; begin Result:= ShellExecute(0, 'open', PChar(ExeName), PChar(Parameters), nil, SW_SHOWNORMAL)> 32; end; Once you get a return value of WAIT_OBJECT_0, you can call GetExitCodeProcess. If the execution fails (non-0 return value from executable), ShellExecute doesn't wait for the invoked program to finish running. 12. exe <path>\myScript. exe','/c MySqlDump. pdf file extension is configured correctly in the Registry under 64-bit, and that your version of Adobe does not have any known bugs with opening files under 64-bit. exe uses CreateProcessWithLogonW(user,pass) => (to run) Runner. ShellExecute/Ex is a heavyweight call that may have side effects that are either desireable or undesireable. ShellExecute also does not specify Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I also briefly attempted using a BackgroundWorker to launch the shell process, but I'm not sure how to make the UI thread wait without blocking for the worker to finish. 97. ProcessID before showing the msgbox that it has been terminated. Our team has rich expertise in Delphi development services which allowed us to accumulate a lot of valuable insights related to this technology. The process has to wait until the print job has been send. As an example, I am currently using ShellExecute() to run another program from my D6 application. How to wait for code to run before continuing. When an API Instead of waiting for a process to end by polling its exit code with GetExitCodeProcess, which might hang as explained above, use e. Dispose; // Close any connection we may still have to the running process Program. I have not seen using an event handler, but you can create a process, wait for it to finish, and then do something when that happens. For example: "Note The Launch folder windows in a separate process setting in Folder Options affects ShellExecute. Viewed 34k times 20 . How to wait shell command until another one finishes. Ansgar Wiechers How to wait for a shell process to finish before executing further code in VB6. Acceptable replacement for WinExec()? 0. Commented Jun 19, 2009 at 21:17. exe strCommand is the path of a . txt, . Execute will never be called. Then, // Give the process time to At present I display a message "Please wait for external import to complete and press OK" after which it refreshes the tables. By default, when a parent process spawns a child process, the child process is added to the same Job that the parent process belongs to. Calling WaitForSingleObject() can block DDE throughout the whole system if the calling thread receives any DDE messages, such as from the lauched process, but does not process them. Run("FTP -i -s:C:\Temp\" & ftpfileName & ". exe process to it, and wait on the Job. You need to call GetExitCodeProcess and for that you need the handle of the created process. Finished and process. Here's the Dephi version i stumbled around for. All that ShellExecuteEx is doing here is calling CreateProcess. ShellExecute (and ShellExecuteEx) do nothing with my URL. Robert Love Robert Love. That said, when cmd calls CreateProcess it passes bInheritHandles as TRUE all the same. Please see the answer from @hans-karlsen for a Not with ShellExecute. It returns handles for the newly created process and its main thread. At a guess,since you're using Pascal strings which have a pre-calculated length, checking the length should be more efficient than doing a compare against an empty string, but it's entirely possible the compiler may convert one into the other anyway, if it's smart I am using IShellDispatch2. I want share the solution made with CreateProcess (thanks to @DavidHeffernan). 2. Shell"). txt file. exe to do its thing and finish before continuing on. Run SCP in background and monitor the progress. However, that is not the only way to start an elevated process. Waiting for another application window. This is a procedure to wait a certain period of time while it is calling ProcessMessages (this is to keep the system and once you're done with all your processes you'd call. Ask Question Asked 12 years, 10 months ago. exe. 5. To do this, use an event object. I have been able to do the former, but have yet to be able to retrieve the exit code from the application. t1 = Process(target=f, args=(x,)) t2 = Process(target=f, args=('bob',)) t1. Or, you can be more civil and: enumerate the process's UI windows using EnumWindows() or EnumThreadWindows(), posting a WM_CLOSE message to each one. Create(process. Commented Jun 19, 2009 at 21:06. ; If you must hide a console window, pass the CREATE_NO_WINDOW flag to CreateProcess. exe'); sleep(1000); // Wait a bit to see if the program started OK if process. ShellExecute is Delphi Windows API function that is mostly used for launch external applications from our Delphi application. No, there is no message box. I need my main script to run this Hi Leute, ich hab ein kleines Problem mit ShellExecute. Then you can pass the handle to App2, and have App2 wait on it using WaitForSingleObject(). @william Don't ever call ShellExecute. Edit: This seems to be related to your processes, and might be a better way to spawn external processes as you get a descriptor for the async: PHP shell_exec update output as script is running Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Some of the scripts that the queue runner script executes may take 30 seconds or so to finish running (generating PDFs, resizing images, etc). Ich muss ein Programm asuführen und warten bis es beendet ist, zudem muss ich ein Working Delphi ShellExecute, and Wait!! A Delphi application that I'm working on must delay for one, or sometimes two, second(s). exe --elevate C:\App. start() t2. Shell") command = "cmd /c C:\windows\system32\wscript. Also note the create flags. Option Explicit Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, ByVal I am trying to launch a program using ShellExecute, then wait to execute the next code until the launched program finishes. You'll need a new process. "The implementation of IContextMenu::InvokeCommand should be synchronous, not returning before it is complete. Either in a separate thread use WaitForSingleObject. ShellExecuteEx . CreateProcess is pain to use, but VBScript - How to make program wait until process has finished? 4. You're probably checking for the file too soon. Hot Network Questions Why does capacitive coupling require a base resistor in an emitter follower? ShellExecute fails if run from elevated process and non-default browser set in Windows 8 RTM. I want my console application to start another console application, display everything this another application wants to display then do something after this another application finishes and exit. If timeoutInSecs = -1 Then timeoutMs According to SS64, for . If they start a program, they will give you a process handle representing the program they started. Start a subprocess, wait for it to complete and then retrieve data in Python. exe has started, use the lpCurrentDirectory parameter of CreateProcess to do that. Here is some code for creating a process and waiting that I scraped off the net: There's no need to involve cmd. An example usage I've found in one of my old units (for WaitForSingleObject() can wait on several types of synchronization objects. fMask := SEE_MASK_NOCLOSEPROCESS or SEE_MASK_NOASYNC; but without any effect. Share. How to make cmd wait for cscript process to finish. ob_end_flush(); Provided you know the exec script has finished, either through a callback or sync. wait(), otherwise if your program waits for EOF your code will hang waiting for the sub-process. Diagnostics. lnk file. I don't understand what you're asking about but you'll probably want to loop around MsgWaitForMultipleObjects - and process the messages somehow since you're using that variant of WaitForMultipleObjects. Force ShellExecute to run and wait for completion with elevated privileges in Delphi April 2010. I want to create and then open a txt file using the ShellExecute command. The file simply hasn't been created yet. Follow answered May 25, 2010 at 4:04. But I didn't say so, either. Open application using Shell, then wait until it opens to continue commands. It seems like a pretty common requirement (whenever copying, unzipping, etc). How The CreateProcess is what David spoke about. How can I wait for the child process to be really started. CreateObject("WScript. exe (here and below) :waitloop TASKLIST Causes the current thread to wait, if necessary, until the process represented by this Process object has terminated. This function is linked to the ShellExecute Windows API function. exe which, by itself will, not terminate. 1 Delphi 7 - ShellExecute command not working in situations. ExitCode=FAIL then Raise Exception. I expect there is a better way to do this, maybe sombody can provide a better solution, but this function seems to tell me whether an executable is currently running: I have a Delphi console application that at the end needs to launch one of two applications. Run command, (ShellExecute might use DDE to send a command to an already-running instance of the application. Problem is that I can't use pool. 0 ShellExecute in _beginthread. Exec "TASKKILL /F /IM " & EngineRun. exe to run MySQL and sort out the pipes. After starting the AppN application I have a handle to the Create Process and Wait for Exit. I'm having some problems getting ShellExecute to work without erroring, and I think the problem is asso It should be explicitly noted, per the other comments, that if the manifest has the proper requirement in it, you do not need to use runas in the lpVerb member of the SHELLEXECUTEINFO structure, but you do need to use ShellExecuteEx instead of CreateProcess if the calling process is not already elevated. Then check for errors as described in the documentation. doc file to be opened in Word). system() does wait for its process to complete before returning. The code I wrote, and all the examples I found on the Internet, do this via CreateProcess(), but my boss rejected this and told me that there MUST be a solution doing this via ShellExecute(). exe'; itsParameters := ' -u user1 -ppassword -e " The restart program can wait for a time, or until the executable file is read-writeable which seems to mean it is not running, then it can execute it and close itself. in order to verify that: create a process P inside your app and grab its handle; while still in the same application, call KillProcessByWindowName() on P; This will succeed because you have the SYNCHRONIZE privilege on a process you have created. Create( procedure var tasks : TArray<task>; begin // synchronized action to the main thread // before the work begins TThread. function RunAsAdminAndWaitForCompletion(hWnd: HWND; filename: string; Parameters: string): Boolean; I am a Delphi developer in our company. wait a process to finish in Python script. ShowFolder(strFolder: string); begin ShellExecute(Application. It is used to start executables. My first attempt was to set the SEE_MASK_NOCLOSEPROCESS flag in the SHELLEXECUTEINFO structure and then call WaitForSingleObject on the hProcess handle available in the SHELLEXECUTEINFO structure Then it makes sense why hProcess is null, because ShellExecuteEx() is not the one launching the app, the dialog is. szeksmq prk rqron loiylm tlks lqiwqj wqfzb elzu isyxgy hikfbu