void GrKillWindow ( GR_WINDOW_ID wid );
void GrKillWindow
This function forces an immediate shutdown of the specified window and disconnects the client that owns the window.
Use this function to kill an application that has locked up and is not responding to GR_EVENT_TYPE_CLOSE_REQ events.
GrNewWindow(), GrCloseWindow(), GrDestroyWindow(), GrUnmapWindow().