Peekmessage issue for WM_MOUSEFIRST, WM_MOUSELAST

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while ( ::PeekMessage(&msg, m_hWnd, WM_MOUSEFIRST, WM_MOUSELAST, PM_REMOVE) )

this loop is not ending some times could you please let me know what might be the problem.

this functionality i wrote for Track the strecthing of a cell.

What I have tried:

C++

while ( true )
{
		MSG msg;
		while ( ::PeekMessage(&msg, m_hWnd, WM_MOUSEFIRST, WM_MOUSELAST, PM_REMOVE) )
		{
			if ( msg.message != WM_MOUSEMOVE )
			{
				dc.DrawDragRect(&cRectLast, CSize(2, 2), NULL, CSize(2, 2));
				DispatchMessage(&msg);
				return;
			}
			else
			{
				CPoint cPoint(GET_X_LPARAM(msg.lParam),    GET_Y_LPARAM(msg.lParam));
            }

Posted 13-Nov-17 19:38pm

Member 12677926

Updated 2-Dec-17 22:31pm

KarstenK

v2

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KarstenK · Answer 1 · 2017-12-02T22:31:00

The documentation of PeekMessage says that it only returns false, if no message is available. Take also a look at the example code in this articel.

Make an output of the incoming messages to better understand the incoming messages.

Your code snippet: the outer loop will only get exited with the return, else you get an re-entry per the heading while.