Provides a default message loop.
Run acquires and dispatches Windows messages until the application receives a WM_QUIT message. If the application's message queue currently contains no messages, Run calls OnIdle to perform idle-time processing. Incoming messages go to the PreTranslateMessage member function for special processing and then to the Windows function TranslateMessage for standard keyboard translation; finally, the DispatchMessage Windows function is called.
Run is rarely overridden, but you can override it to provide special behavior.