The WM_CANCELMODE message is sent to the focus window when a dialog box or message box is displayed; this enables the focus window to cancel modes, such as mouse capture.
WM_CANCELMODE
Parameters
This message has no parameters.
Return Values
If an application processes this message, it should return zero.
Default Action
The DefWindowProc function cancels internal processing of standard scroll bar input, cancels internal menu processing, and releases the mouse capture.
See Also