屏幕传输的源代码，改进了算法，传输效率更高。 D7反向連接方式,服務端采用精簡VCL,程序體積比較小 D7正向連接方式-Screen Transfer the source code to improve the algorithm, the transmission more efficient. D7 reverse connection, the server uses to streamline the VCL, program size is relatively small