Abstract: This paper presents an improved screen-sharing scheme applied to computer room teaching. The scheme uses C/S mode. The server is timed to capture screen image and mouse icon, saves them as bitmap data stream, uses GDI+to compress it to JPEG file, then uses the socket to broadcast image data. The client receives the image data, then displays it on the local screen, so screen sharing is implemented. Experimental results show that the server screen reproduced on the client’s screen is clear and smooth, and it can maintain real-time synchronization with the server. The scheme meets practical needs of multi-media teaching in the LAN environment.

Key words: computer room teaching, screen-sharing, GDI+, socket