Delphi带用户选择的登录界面，带用户选择这样可以方便用户选择用户名，而不用手动输入，提升用户操作体验，是一个体验好的软件应该考虑的功能，同时，代码也并不复杂，新手也能看懂的。-Delphi login screen with user-selected with the user chooses so users can easily select the user name instead of manual input, to enhance the user experience, is a good software should be considered functional experience, while the code is not complicated, novice can understand.