WM_MOUSEFIRST，WM_MOUSELAST的Peekmessage问题 [英] Peekmessage issue for WM_MOUSEFIRST, WM_MOUSELAST

问题描述

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



这个循环没有结束有些时候你可以让我知道可能是什么问题。





我为跟踪细胞的拉伸而写的这个功能。



我尝试了什么：

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:

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));
            }

推荐答案

PeekMessage文档表示，如果没有可用的消息，它只会返回false。另请参阅本文中的示例代码。



输入传入的消息以更好地理解传入的消息。



你的代码片段：外部循环只会在返回的情况下退出，否则你会按照标题重新输入。

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.

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