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 WM_CAPTURECHANGED

The WM_CAPTURECHANGED message is sent to the window that is losing the mouse capture.

A window receives this message through its WindowProc function.

    LRESULT CALLBACK WindowProc(
      HWND hwnd,       // handle to window
      UINT uMsg,       // WM_CAPTURECHANGED
      WPARAM wParam,   // not used
      LPARAM lParam    // handle to window (HWND)
    );

Parameters

• wParam
This parameter is not used.
• lParam
Handle to the window gaining the mouse capture.

Return Values

An application should return zero if it processes this message.

Remarks

A window receives this message even if it calls ReleaseCapture itself. An application should not attempt to set the mouse capture in response to this message.

When it receives this message, a window should redraw itself, if necessary, to reflect the new mouse-capture state.

Requirements

• Windows NT/2000 or later: Requires Windows NT 4.0 or later.
• Windows 95/98/Me: Requires Windows 95 or later.
• Header: Declared in Winuser.h; include Windows.h.

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Notebook exported on Monday, 7 July 2008, 18:56:50 PM Eastern Daylight Time