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Jun 17th, 2009
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PeekMessage and PostQuitMessage

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Im kind confuse about how PostQuitMessage works..

Im using like this:
C++ Syntax (Toggle Plain Text)
  1. case WM_CLOSE :		DestroyWindow( hWnd );	break;	//send WM_DESTROY
  2.  
  3. case WM_DESTROY :	CleanUp();
  4. 			gsp_quit = true;
  5. 			PostQuitMessage( 0 );			//send WM_QUIT
  6.  
  7. 					break;
That is on my WndProc function.


My message loop is like that:
C++ Syntax (Toggle Plain Text)
  1.  
  2. while ( !gsp_quit ){
  3.  
  4. 		if( PeekMessage( &gsp_msg, NULL, NULL, NULL, PM_REMOVE ) ){
  5.  
  6. 			TranslateMessage( &gsp_msg );
  7. 			DispatchMessage	( &gsp_msg );
  8.  
  9. 		}//while F PeekMessage()
  10.  
  11. 	}//F while !gsp_quit
  12.  
  13. 	//***
  14.  
  15. 	return gsp_msg.wParam;//it should return 0

The problem is that it just returns 0 (zero) if I use while( PeekMessage() ) instead of 'If', or if I call PeekMessage again at //***

So, i guess theres some overheads on PostQuitMessage before it send your exit code given on its param..what are those overheads?

And where can I search for exit codes info? I was trying to find it at MSDN but I didnt..
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Icebone1000 is offline Offline
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Jun 18th, 2009
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Re: PeekMessage and PostQuitMessage

Do you know the difference between GetMessage and PickMessage function?

Here is a text for you.

You can use the PeekMessage function to examine a message queue during a lengthy operation. PeekMessage is similar to the GetMessage function; both check a message queue for a message that matches the filter criteria and then copy the message to an MSG structure. The main difference between the two functions is that GetMessage does not return until a message matching the filter criteria is placed in the queue, whereas PeekMessage returns immediately regardless of whether a message is in the queue.
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adatapost is offline Offline
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Jun 19th, 2009
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Re: PeekMessage and PostQuitMessage

I knew..but I think I just figure out my stupid mistake,
Im quiting the loop before proccessing the WM_QUIT( because gsp_quit became true and the message is not processed )..-_-"
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