It opens the video file according to the File/FileType/LibType properties. Immediately after calling the Open method, it tries to connect to the video file or camera.

When the open process is complete, the "READY" event will occur in OnVideoEvent. After the "READY" event occurs, methods such as Play, GetDuration, and GetPosition can be called.

If Open fails, a "ERROR_OPEN" event will be generated in OnVideoEvent.