The ReleaseCapture function releases the mouse capture from a window in the current thread and restores normal mouse input processing. A window that has captured the mouse receives all mouse input, regardless of the position of the cursor, except when a mouse button is clicked while the cursor hot spot is in the window of another thread.
BOOL ReleaseCapture(VOID)
This function has no parameters.
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
An application calls this function after calling the SetCapture function.
Windows 95: Calling this function causes the window that is losing the mouse capture to receive a WM_CAPTURECHANGED message.