此例运用HOOK技术，编写的屏幕捕捉系统，在VC6.0下试验通过，利于学习网络编程的同学学习HOOK技术来编写网络程序。-HOOK technique used in this case, write the screen capture system, under the test adopted by VC6.0, which will help students to learn network programming techniques to learn to write networ