单文档程序。窗口拆分。左视图嵌入的是文本框和一个按钮。在文本框输入字符，点击按钮，显示在右边视图里。本例简单示范了视图间的通信方法。-Single document procedures. The window is split. The left view embedded in the text box and a button. Enter the characters in the text box, click the but