Windows Forms Verification Program Control Http://www.microsoft.com/china/msdn/library/EnterpriseDevelopment/softwareDev/vsdnadvnetvbnet04082003.mspx
Use custom verification component library extension Windows Forms http://www.microsoft.com/china/msdn/library/langtool/vcsharp/winforms03162004.mspx
Use custom validation component libraries extended Windows Forms, Part 2 (Windows Forms) http://www.microsoft.com/china/msdn/library/langtool/vcsharp/cswinforms04202004.mspx
