解决拖动无标题窗口时无法同时响应ButtonDown和ButtonUp消息的问题

switch(message)
{
case WM_LBUTTONDOWN:
{
//AfxMessageBox(_T("鼠标按下"));
****your code****		}
break;
case WM_LBUTTONDBLCLK:
{
//AfxMessageBox(_T("鼠标双击"));
<code class="c plain">***your code		// }
break;

case WM_LBUTTONUP:
{
//AfxMessageBox(_T("鼠标弹起"));
****your code****若无法捕获系统消息里处理，鼠标弹起up时会产生WM_CAPTURECHANGED消息	}
break;
case WM_CAPTURECHANGED:
{
m_intCapture++;
****your code****//关键：在此鼠标弹起，会产生CAPTURECHANGED消息****
}
break;
case WM_MOVING:
{
//AfxMessageBox(_T("鼠标移动"));
****your code****		}
break;