GetActiveWindow always fails

Hi, I tried to read as most topics here as I could, but still haven't found the answer. I try to get handle of PowerPoint from my applivation. PowerPoint has different titles (depending on opened file), so I can't use FindWindow. I also tried EnumWindows, but didn't work (probably my mistake). I have console application and in my situation, it doesn't matter on time when I switch PowerPoint to be active. After PowerPoint is active, I start manualy sending WM_KEYDOWN messages over serial port. Most easy way for me can be something like this:

HWND prog = GetActiveWindow();
if (!prog) printf("next time...");

I can't understand why, but "next time..." appears every time, doesn't matter on which window is active. Any ideas what I'm doing wrong?

http://msdn.microsoft.com/library/de...tivewindow.asp

Quote:

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GetActiveWindow Function

The GetActiveWindow function retrieves the window handle to the active window attached to the calling thread's message queue.

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Remarks

To get the handle to the foreground window, you can use GetForegroundWindow.

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So, the GetActiveWindow function will fail if it is a console, but it doesn't matter because that probably isn't the API you wanted in the first place.

Thank you... when I use GetForegroundWindow(), no error appears. After few hours of searching, I didn't see my fault. When I send message to my "help" programm, in which I defined WM_KEYDOWN and VK_DOWN, everything works exactly as I want. But when I send the same message and PowerPoint is active, nothing happens :-( (I need next slide)

PostMessage(prog, WM_KEYDOWN, VK_DOWN, NULL);

I would dok something more like, when you want to change a slide, getforegroundwindow (error check: if window class of foreground window == window class of power point), then use sendinput/keybd_event to synthesize a down keystroke (instead of wm_keydown).

http://msdn.microsoft.com/library/de.../sendinput.asp
http://msdn.microsoft.com/library/de...eybd_event.asp

I think using PowerPoint COM interface is the right way.