SetCapture使用的问题

[naruto1412]

一个简单的工程 点”确定“按钮调用SetCapture() ，然后在窗口响应OnLButtonUp消息，请问为什么 每次都要点击一下 确定 然后本窗口才能响应一次OnLButtonUp消息。比如点一下确定 然后在别的窗口单击一下 ，本程序OnLButtonUp才能响应一次，每次都要先点下确定，在别的窗口的单击才能在本程序内截获到。不加 ReleaseCapture() 也是这样。能不能执行完SetCapture 以后在别的窗口的单击事件都自动捕获，不需要每次都执行一次SetCapture() 呢。

[worldy]

SetCapture The SetCapture function sets the mouse capture to the specified window belonging to the current thread. Once a window has captured the mouse, all mouse input is directed to that window, regardless of whether the cursor is within the borders of that window. Only one window at a time can capture the mouse. If the mouse cursor is over a window created by another thread, the system will direct mouse input to the specified window only if a mouse button is down.

[naruto1412]

引用 1 楼 worldy 的回复:

SetCapture The SetCapture function sets the mouse capture to the specified window belonging to the current thread. Once a window has captured the mouse, all mouse input is directed to that window, regardless of whether the cursor is within the borders of that window. Only one window at a time can capture the mouse. If the mouse cursor is over a window created by another thread, the system will direct mouse input to the specified window only if a mouse button is down.

什么意思 ，有什么方案 能解决吗

[Sandrer]

SetCapture 一般只在 WM_LBUTTONDOWN 调用 ReleaseCapture 在 WM_LBUTTONUP 调用