Activate a parent window

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I have a Windows form program that spawns a child process(.exe). Upon execution the child becomes the active window. How can I return control to the parent so that it is the active window programatically.

Posted 19-Jan-12 3:14am

electriac

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Dave Kreskowiak · Answer 1 · 2012-01-19T05:06:00

Solution 1

Me.Activate()

Of course, you can only execute that line of code after the child .EXE launches as shows its main window. Look at the documentation on the Process class and you'll see a method called "WaitForInputIdle".

Posted 19-Jan-12 5:06am

Dave Kreskowiak

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[no name] 19-Jan-12 15:36pm

//tried - to no avail
//RMshow is a simple little picture display:

string prog = Application.StartupPath + "\\RMshow.exe";
System.Diagnostics.Process.Start(prog, "\x22" + picname + "\x22");
this.Activate();

[no name] 19-Jan-12 16:01pm

It would seem to me there should be some way to Activate the parent or Deactivate the child. I would be happy to alter either piece of code. There is a Deactivate command but it only reports if the client has been deactivated. I can find no way to force deactivation of the child or activate the parent.

[no name] 19-Jan-12 17:53pm

Thanks for your comment Dave it led me to investigate timing issues. Putting this.Activate() on a three second timer solved the problem.

Dave Kreskowiak 19-Jan-12 20:10pm

Yeah, but what if, for some reason, it takes longer than 3 seconds to start?? It's possible...

[no name] 20-Jan-12 5:56am

I tried to use the method you suggested but could not write anything that would compile. Could you give me a piece of sample code?

Activate a parent window

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Activate a parent window

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