界面编程之设计多边形窗体

1. 新建一个工程demo

2. 添加以下引用

 

using  System.Runtime.InteropServices;[DllImport( " gdi32 " )] private   static   extern  IntPtr CreatePolygonRgn(Point[] lpPoint, int  nCount, int  nPolyFillMode);[DllImport( " user32 " )] private   static   extern  IntPtr SetWindowRgn(IntPtr hWnd,IntPtr hRgn, bool  bRedraw); const   int  WINDING  =   2 ;

 3. 添加窗体的Load方法：

 

private   void  设计多边形窗体_Load( object  sender, System.EventArgs e) ... {    Point[] pt=...{        new Point(this.Width /2,0),        new Point(0,this.Height/2),        new Point(this.Width/2,this.Height),        new Point(this.Width,this.Height/2),        new Point(this.Width,0)        };            IntPtr m_rgn;        m_rgn=CreatePolygonRgn(pt,5,WINDING);        SetWindowRgn(this.Handle,m_rgn,true);    } }