谈谈类和结构的区别？

最大区别一个是引用类型，一个是值类型 默认成员访问为public是另外一个区别

1. 在.net（C# or vb.net）中如何获得当前窗体或控件的句柄，特别是控件本身的句柄（请列举）。

this(C#) Me(vb.net).

2在.net（C# or vb.net）中如何用户自定义消息，并在窗体中处理这些消息。

在form中重载DefWndProc函数来处理消息:

protected override void DefWndProc ( ref System.WinForms.Message m )

{

-To talk about the difference between Class and structure? Greatest difference between a reference type, a value type is the default access for members of public is another difference between 1.. Net (C# Or vb.net) in the current form or how to obtain a handle to control, especially control their own Handle (please list). this (C#) Me (vb.net) .2 in. net (C# or vb.net) How user-defined message, and deal with these messages in the form. In the form of heavy-duty DefWndProc function to deal with the news: protected override void DefWndProc (ref System.WinForms.Message m) (