Building a window

代码说明：

  设计一个简单VB程序: 它由一个窗体、一个文本框和3个命令按钮组成。窗体的标题为"Visual Basic 程序设计示例"，当用户单击命令按钮“显示”时，文本框中出现“欢迎使用Visual Basic 6.0”,窗体上显示“你好”，单击命令按钮“清除”时,清除文本框中显示的内容和窗体上的内容，单击命令按钮“结束”时，结束程序。(Design a simple VB program: It consists of a form, a text box and 3 command buttons. The title of the form is "Visual Basic programming example", when the user clicks the command button "display", the text box appears "welcome to use Visual Basic 6", the form on the form "hello", click the command button "clear", clear the contents of the text box and the contents of the form on the form, click the command button "knot" When "beam", the end of the program.)