Delphi:“API编写窗口程序”的Delphi演示程序，请情请参见WindowDemo.dpr，在打开编译生成的exe后，在窗体上点击右键，会弹出一个窗口： 和您打个招呼 。

-Delphi "API to write the window procedure" Delphi demo program, please refer to the situation WindowDemo.dpr, compiled after opening the exe, right click on the form will pop up a window:　and that you say hello.