Re: OpenProcess() returns different handles

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#3974

From: Bob Gonder
Date: Mon, 10 Apr 2006 16:37

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Wiebe Vos wrote:

>I want to use the returned handle to check if the program is (still) alive
>and be able to kill it.

The hProcess member of the PROCESS_INFORMATION structure you passed to
CreateProcess() should give you that handle.

{Note: I am not recommending this code. It is for illustration
purposes only}

    if( CreateProcess( 0, command, 0, 0, FALSE, NORMAL_PRIORITY_CLASS,
		 0, 0, &si, &pi ) )
    {
	CloseHandle( pi.hThread ); 
	do{
		WaitForSingleObject( pi.hProcess, 100);
		GetExitCodeProcess ( pi.hProcess, &exitCode);
	}while( exitCode == STILL_ACTIVE );

	CloseHandle( pi.hProcess ); 
    };

>However GetExitCodeProcess ( returnedHandle, &exitCode) gives exitCode=0.

Did you check the return value of the function itself?

	if( ! GetExitCodeProcess ( pi.hProcess, &exitCode) )
		ReportError( "GetExitCodeProcess", GetLastError() );

One also wonders why you ask for the handle to be inheritable (true)?
> OpenProcess ( PROCESS_ALL_ACCESS,  true, processInfo.dwProcessId)

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From: Bob Gonder <notbg@notmindspring.invalid>
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Subject: Re: OpenProcess() returns different handles
Date: Mon, 10 Apr 2006 09:37:02 -0700
Organization: MindSpring Enterprises, Inc.
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