id卡读源码，广泛应用于各类门禁考勤系统。-id cards reading the source code, which are widely used in various disucssed system.

CDC的文字处理程序的编写，如何产生自定义字体和自定义插入符，熟悉对CString类的使用。通过对卡拉OK程序的编写，定时器的使用和DrawText函数的巧妙运用。如何使用CDC的裁减功能。-Master the CDC s word processing program to write, how to generate custom fonts and custom caret, familiar with the use of CString class. By Kara OK progr

财务应用程序，检测信号用卡的账号是否合法，应用Mod10检测-Financial applications, the detection signal card account is legitimate, the application Mod10 detection