Then, the size of the video playback window is set to the same size and position as the client area (loaded in rect) of the main application window (g_hWnd).

• 然后,将视频播放窗口的大小和位置设置为与主应用程序窗口(g_hWnd)的客户端区域(在rect中加载)的大小和位置相同。