使用C#画非客户区。

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using HANDLE = System.IntPtr;
using HWND = System.IntPtr;
namespace WuyinMuManager
{
 /**//// <summary>
/// Form1 的摘要说明。
 /// </summary>
public class WuyinMsnForm : System.Windows.Forms.Form
{
 private System.ComponentModel.IContainer components=null;
 Point location = new Point(0,0);
  Point p= new Point(0,0);
   Size size = new Size(600,400);
   bool isMax = false;
   private System.Windows.Forms.ContextMenu ControlMenu;
   private System.Windows.Forms.MenuItem menuItem6;
   private System.Windows.Forms.MenuItem menuRestore;
   private System.Windows.Forms.MenuItem menuMove;
   private System.Windows.Forms.MenuItem menuSize;
   private System.Windows.Forms.MenuItem menuMin;
   private System.Windows.Forms.MenuItem menuMax;
   private System.Windows.Forms.MenuItem menuClose;
   bool cursor=false;
   Graphics g = null;
   bool IsDiaLog = false;
   public const int WM_NCPAINT = 0x85;
   Color DeskTop = Color.FromArgb(122,150,223);
   Color Caption = Color.FromArgb(216,228,248);
   
   protected override void WndProc(ref Message m)
   {
    
    RectangleF rectf;
    switch (m.Msg)
    {
     case WM_NCPAINT :
      IntPtr hrgn = m.WParam;
      if ( hrgn != (IntPtr)1 )
      {
       Region rgn = Region.FromHrgn(hrgn);
       g = CreateGraphics();
       rectf = rgn.GetBounds(g);
       PaintNonClientArea(g, rectf);
      }
      else
      {
       g = CreateGraphics();
       rectf = new RectangleF(0,-23, Width, 23);
       PaintNonClientArea(g, rectf);
       g.Dispose();
      }
    
      //base.WndProc(ref m);
      break;
     default :
      base.WndProc (ref m);
      break;
    }
   }
   public bool isDialog
   {
    get
    {
     return IsDiaLog ;
    }
    set
    {
     IsDiaLog =value;
    }
   }
   
   void PaintNonClientArea(Graphics g,RectangleF r)
   {
    //this.PainWindow(g);
   }
 
   public WuyinMsnForm()
   {
    //
    // Windows 窗体设计器支持所必需的
    //
    InitializeComponent();
    this.MinimumSize = new Size(160,20);
    //int MyMenu = GetSystemMenu(this.Handle,0);
    this.FormBorderStyle=FormBorderStyle.None;
    //LoadMenu((IntPtr)MyMenu,"");
    //MessageBox.Show(MyMenu.ToString());
    //
    // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
    //
   }
   /**//// <summary>
   /// 清理所有正在使用的资源。
 /// </summary>
 protected override void Dispose( bool disposing )
 {
  if( disposing )
  {
   if(components != null)
   {
    components.Dispose();
   }
  }
  base.Dispose( disposing );
 }
 protected override void OnPaint(PaintEventArgs e)
 {
  //int handle = Win32.User.GetWindowDC(this.Handle);
  g = this.CreateGraphics();
   //g = Graphics.FromHdc(((IntPtr)handle));
   this.PainWindow(g);
   //Win32.RECT Rect = new Win32.RECT();
   //Win32.User.GetWindowRect((IntPtr)handle,ref Rect);
   //Win32.User.ReleaseDC(this.Handle,(IntPtr)handle);
  }
  public override string Text
  {
   get
   {
    return base.Text;
   }
   set
   {
    DrawText(this.CreateGraphics());
    base.Text = value;
   }
  }

  protected override void OnMouseMove(MouseEventArgs e)
  {
   //this.Form1_MouseMove(this,e);
   base.OnMouseMove (e);
  }

  void PainWindow(Graphics gx)
  {
   Bitmap bmp = new Bitmap(this.Width,this.Height);
   Graphics g = Graphics.FromImage(bmp);
   Pen pen;
   //左边框1
   pen = new Pen(Color.FromArgb(133,150,202));
   g.DrawLine(pen,new Point(0,0),new Point(0,this.Height));
   //上边框1
   g.DrawLine(pen,new Point(0,0),new Point(this.Width,0));
   pen = new Pen(Color.White);
   g.DrawLine(pen,new Point(1,1),new Point(1,this.Height-1));
   g.DrawLine(pen,new Point(1,1),new Point(this.Width-1,1));
   //右边框1
   pen = new Pen(Color.FromArgb(90,108,162));
   g.DrawLine(pen,new Point(this.Width-1,1),new Point(this.Width-1,this.Height));  
   //下边框1
   g.DrawLine(pen,new Point(1,this.Height-1),new Point(this.Width,this.Height-1));
   pen = new Pen(Color.FromArgb(191,202,235));
   g.DrawLine(pen,new Point(this.Width-2,2),new Point(this.Width-2,this.Height-2)); 
   g.DrawLine(pen,new Point(2,this.Height-2),new Point(this.Width-2,this.Height-2)); 
   Brush brush = new SolidBrush(Color.FromArgb(206,216,239));
   g.FillRectangle(brush,2,2,this.Width-4,this.Height-4);
   if(this.BackColor.ToKnownColor()!=KnownColor.Control)
   {
    brush = new SolidBrush(this.BackColor);
    g.FillRectangle(brush,4,4,this.Width-8,this.Height-8);
   }
   else
   {
    this.BackColor = Caption;
    brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(new Point(4,4),new Size(this.Width-8,20)),Color.FromArgb(248,248,248),Color.FromArgb(220,226,240),3600,true);
    g.FillRectangle(brush,4,4,this.Width-8,this.Height-8);    
   }
   //画标题栏
   brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(new Point(4,4),new Size(this.Width-8,20)),Color.FromArgb(192,208,240),Color.FromArgb(248,248,248),120,true);
   g.FillRectangle(brush,4,4,this.Width-8,20);
   //画图标和标题
   DrawIcon(g);
   DrawText(g);
   //画按钮
   if(!this.isDialog)
   {
    this.DrawMinButton1(g);
    if(this.MaximizeBox)
     this.DrawMaxButton1(g);
   }
   this.DrawCloseButton1(g);
   gx.DrawImage(bmp,0,0);
  }
  void DrawIcon(Graphics g)
  {
   g.DrawIcon(this.Icon,new Rectangle(new Point(6,6),new Size(16,16)));
  }
  void DrawText(Graphics g)
  {
   Brush brush = new SolidBrush(Color.FromArgb(61,77,129));
   g.DrawString(this.Text,new Font("tohoma",9),brush,new Point(26,6),StringFormat.GenericDefault);
  }
  void DrawMinButton1(Graphics g)
  {
   //最小化
   Brush brush = new SolidBrush(Color.FromArgb(128,144,168));
   g.FillRectangle(brush,this.Width-57,6,16,16);
   brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(new Point(6,this.Width-63),new Size(17,17)),Color.FromArgb(199,207,231),Color.FromArgb(248,248,248),System.Drawing.Drawing2D. LinearGradientMode.Vertical);
   g.FillRectangle(brush,this.Width-56,7,14,14);
   Pen pen;
   if(this.MinimizeBox)
    pen = new Pen(Color.FromArgb(48,64,120),3);
   else
    pen = new Pen(Color.Silver,3);
   g.DrawLine(pen,new Point(this.Width-53,17),new Point(this.Width-46,17));
  }
  void DrawMinButton2(Graphics g)
  {
   //最小化
   Brush brush = new SolidBrush(Color.FromArgb(128,144,168));
   g.FillRectangle(brush,this.Width-57,6,16,16);
   brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(new Point(6,this.Width-63),new Size(17,17)),Color.White,Color.Snow,System.Drawing.Drawing2D. LinearGradientMode.Vertical);
   g.FillRectangle(brush,this.Width-56,7,14,14);
   Pen pen;
   if(this.MinimizeBox)
    pen = new Pen(Color.FromArgb(48,64,120),3);
   else
    pen = new Pen(Color.Silver,3);
   g.DrawLine(pen,new Point(this.Width-53,17),new Point(this.Width-46,17));
  }
  void DrawMaxButton1(Graphics g)
  {
   //最大化或者恢复
   Brush brush = new SolidBrush(Color.FromArgb(128,144,168));
   g.FillRectangle(brush,this.Width-40,6,16,16);
   brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(new Point(6,this.Width-63),new Size(17,17)),Color.FromArgb(199,207,231),Color.FromArgb(248,248,248),System.Drawing.Drawing2D. LinearGradientMode.Vertical);
   g.FillRectangle(brush,this.Width-39,7,14,14);
   if(!isMax)
   {
    brush = new SolidBrush(Color.FromArgb(48,64,120));
    g.FillRectangle(brush,this.Width-37,9,10,10);
    Pen pen = new Pen(Color.White,6);
    g.DrawLine(pen,new Point(this.Width-36,15),new Point(this.Width-28,15));
   }
   else
   {
    brush = new SolidBrush(Color.FromArgb(48,64,120));
    g.FillRectangle(brush,this.Width-34,9,7,7);
    Pen pen = new Pen(Color.White,4);
    g.DrawLine(pen,new Point(this.Width-33,13),new Point(this.Width-28,13));
    g.FillRectangle(brush,this.Width-37,12,7,7);
    g.DrawLine(pen,new Point(this.Width-36,16),new Point(this.Width-31,16));
   }
  }
  void DrawMaxButton2(Graphics g)
  {
   //最大化或者恢复
   Brush brush = new SolidBrush(Color.FromArgb(128,144,168));
   g.FillRectangle(brush,this.Width-40,6,16,16);
   brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(new Point(6,this.Width-63),new Size(17,17)),Color.White,Color.Snow,System.Drawing.Drawing2D. LinearGradientMode.Vertical);
   g.FillRectangle(brush,this.Width-39,7,14,14);
   if(!isMax)
   {
    brush = new SolidBrush(Color.FromArgb(48,64,120));
    g.FillRectangle(brush,this.Width-37,9,10,10);
    Pen pen = new Pen(Color.White,6);
    g.DrawLine(pen,new Point(this.Width-36,15),new Point(this.Width-28,15));
   }
   else
   {
    brush = new SolidBrush(Color.FromArgb(48,64,120));
    g.FillRectangle(brush,this.Width-34,9,7,7);
    Pen pen = new Pen(Color.White,4);
    g.DrawLine(pen,new Point(this.Width-33,13),new Point(this.Width-28,13));
    g.FillRectangle(brush,this.Width-37,12,7,7);
    g.DrawLine(pen,new Point(this.Width-36,16),new Point(this.Width-31,16));
   }
  }
  void DrawCloseButton1(Graphics g)
  {
   //关闭
   Brush brush = new SolidBrush(Color.FromArgb(128,144,168));
   g.FillRectangle(brush,this.Width-23,6,16,16);
   brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(new Point(6,this.Width-63),new Size(17,17)),Color.FromArgb(199,207,231),Color.FromArgb(248,248,248),System.Drawing.Drawing2D. LinearGradientMode.Vertical);
   g.FillRectangle(brush,this.Width-22,7,14,14);
   Pen pen = new Pen(Color.FromArgb(48,64,120),2);
   g.DrawLine(pen,new Point(this.Width-20,9),new Point(this.Width-11,18));
   g.DrawLine(pen,new Point(this.Width-11,9),new Point(this.Width-20,18));
  }
  void DrawCloseButton2(Graphics g)
  {
   //关闭
   Brush brush = new SolidBrush(Color.FromArgb(128,144,168));
   g.FillRectangle(brush,this.Width-23,6,16,16);
   brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(new Point(6,this.Width-63),new Size(17,17)),Color.Red,Color.Snow,System.Drawing.Drawing2D. LinearGradientMode.Vertical);
   g.FillRectangle(brush,this.Width-22,7,14,14);
   Pen pen = new Pen(Color.FromArgb(48,64,120),2);
   g.DrawLine(pen,new Point(this.Width-20,9),new Point(this.Width-11,18));
   g.DrawLine(pen,new Point(this.Width-11,9),new Point(this.Width-20,18));
  }
  Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
  /**//// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {
   this.ControlMenu = new System.Windows.Forms.ContextMenu();
   this.menuRestore = new System.Windows.Forms.MenuItem();
   this.menuMove = new System.Windows.Forms.MenuItem();
   this.menuSize = new System.Windows.Forms.MenuItem();
   this.menuMin = new System.Windows.Forms.MenuItem();
   this.menuMax = new System.Windows.Forms.MenuItem();
   this.menuItem6 = new System.Windows.Forms.MenuItem();
   this.menuClose = new System.Windows.Forms.MenuItem();
   // 
   // ControlMenu
   // 
   this.ControlMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                      this.menuRestore,
                      this.menuMove,
                      this.menuSize,
                      this.menuMin,
                      this.menuMax,
                      this.menuItem6,
                      this.menuClose});
   // 
   // menuRestore
   // 
   this.menuRestore.Enabled = false;
   this.menuRestore.Index = 0;
   this.menuRestore.Text = "还原(&R)";
   // 
   // menuMove
   // 
   this.menuMove.Index = 1;
   this.menuMove.Text = "移动(&M)";
   this.menuMove.Click += new System.EventHandler(this.menuMove_Click);
   // 
   // menuSize
   // 
   this.menuSize.Index = 2;
   this.menuSize.Text = "大小(&S)";
   this.menuSize.Click += new System.EventHandler(this.menuSize_Click);
   // 
   // menuMin
   // 
   this.menuMin.Index = 3;
   this.menuMin.Text = "最小化(&N)";
   this.menuMin.Click += new System.EventHandler(this.menuMin_Click);
   // 
   // menuMax
   // 
   this.menuMax.Index = 4;
   this.menuMax.Text = "最大化(&X)";
   this.menuMax.Click += new System.EventHandler(this.menuMax_Click);
   // 
   // menuItem6
   // 
   this.menuItem6.Index = 5;
   this.menuItem6.Text = "-";
   // 
   // menuClose
   // 
   this.menuClose.DefaultItem = true;
   this.menuClose.Index = 6;
   this.menuClose.Shortcut = System.Windows.Forms.Shortcut.AltF4;
   this.menuClose.Text = "关闭(&C)";
   this.menuClose.Click += new System.EventHandler(this.menuClose_Click);
   // 
   // WuyinMsnForm
   // 
   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(160, 120);
   this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
   this.Name = "WuyinMsnForm";
   this.Text = "Form1";
   this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
   this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseDown);
   this.SizeChanged += new System.EventHandler(this.Form1_SizeChanged);
   this.Load += new System.EventHandler(this.WuyinMsnForm_Load);
   this.DoubleClick += new System.EventHandler(this.Form1_DoubleClick);
   this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseUp);
   this.LocationChanged += new System.EventHandler(this.Form1_LocationChanged);
   this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseMove);
  }
  #endregion
  protected override void OnCreateControl()
  {
   base.OnCreateControl ();
  }
  private void Form1_DoubleClick(object sender, EventArgs e)
  {
   if(!this.isDialog)
   {
    Point p = new Point(0,0);
    GetCursorPos(out p);
    if(p.X - this.Location.X>=this.Width-70 || p.Y - this.Location.Y>=20)
     return;
    if(this.Size.Width >=Screen.AllScreens[0].WorkingArea.Size.Width && this.Size.Height>=Screen.AllScreens[0].WorkingArea.Size.Height)
     Restore();
    else
    {
     Max();
    }
   }
  }
  [DllImport("user32")] public static extern int GetCursorPos(out Point lpPoint);
  [DllImport("user32")] public static extern int GetSystemMenu(HWND hwnd, int bRevert);
  [DllImport("user32")] public static extern int LoadMenu(HANDLE hInstance, string lpString);
  //[DllImport("user32")] public static extern int MoveWindow(HWND hwnd, int x, int y, int nWidth, int nHeight, int bRepaint);
  void Restore()
  {
   //MessageBox.Show(String.Format("W:{0},H:{1}",size.Width,size.Height));
   this.Size=this.size;
   this.Location = this.location;
   this.WindowState=FormWindowState.Normal;
   this.isMax=false;
   this.Invalidate();
   this.menuMax.Enabled=true;
   this.menuRestore.Enabled=false;
   this.menuSize.Enabled=true;
   this.menuMove.Enabled=true;
   //this.PainWindow(g);
  }
  void Max()
  {
   //MessageBox.Show(String.Format("W:{0},H:{1}",size.Width,size.Height));
   //this.location = this.Location;
   //this.size = this.Size;
   this.isMax = true;
   this.Size = Screen.AllScreens[0].WorkingArea.Size;
   this.Location=new Point(0,0);
   this.Invalidate();
   this.menuMax.Enabled=false;
   this.menuRestore.Enabled=true;
   this.menuSize.Enabled=false;
   this.menuMove.Enabled=false;
   //this.PainWindow(g);
  }
  void CgBt(MouseEventArgs e)
  {
   if(e.X>this.Width-23 && e.X<this.Width-7 && e.Y>7 && e.Y<20)
   {
    this.DrawCloseButton2(g);
    return;
   }
   else
   {
    this.DrawCloseButton1(g);
   }  
   if(this.isDialog)
    return;   
   if(e.X>this.Width-57 && e.X<this.Width-41 && e.Y>7 && e.Y<22)
   {
    this.DrawMinButton2(g);
    return;
   }
   else
   {
    this.DrawMinButton1(g);
   }
   if(e.X>this.Width-40 && e.X<this.Width-24 && e.Y>7 && e.Y<22)
   {
    this.DrawMaxButton2(g); 
    return;
   }
   else
   {
    this.DrawMaxButton1(g);   
   }
  }
  private void Form1_MouseMove(object sender, MouseEventArgs e)
  {  
   if(e.X>this.Width-70 && e.Y<25)
    CgBt(e);  
   if(isMax)
    return;
   CursorResizeForm(e,this);
   if(e.Button==MouseButtons.Left && e.Y>0 && e.Y<30 && e.X<this.Width-70 && e.Y<=20)
    this.Location=new Point(Control.MousePosition.X-p.X,Control.MousePosition.Y-p.Y);
  }
  private void CursorResizeForm(MouseEventArgs e,Control control)
  {   //鼠标控制窗体大小
   if(e.Y>control.Height-10 && e.Y<control.Height && e.X>control.Width-10 && e.X<control.Width)
    control.Cursor=System.Windows.Forms.Cursors.SizeNWSE; 
   else if(e.X>control.Width-6 && e.X<control.Width && control.Cursor!=System.Windows.Forms.Cursors.SizeNWSE)
    control.Cursor=System.Windows.Forms.Cursors.SizeWE;
   else if(e.Y>control.Height-6 && e.Y<control.Height && control.Cursor!=System.Windows.Forms.Cursors.SizeNWSE)
    control.Cursor=System.Windows.Forms.Cursors.SizeNS;
   else if(e.X>0 && e.X<6 && control.Cursor!=System.Windows.Forms.Cursors.SizeNESW)
    control.Cursor=System.Windows.Forms.Cursors.SizeWE;
   else if(!cursor)
    control.Cursor=Cursors.Default;
   if(e.Button==MouseButtons.Left)
   {
    if(control.Cursor==System.Windows.Forms.Cursors.SizeWE && e.X>16)
     control.Width=Control.MousePosition.X-control.Left+3;
    else if(control.Cursor==Cursors.SizeNWSE)
    {
     control.Width=Control.MousePosition.X-control.Left+3;
     control.Height=Control.MousePosition.Y-control.Top+3;
    }
    else if(control.Cursor==System.Windows.Forms.Cursors.SizeNS)
     control.Height=Control.MousePosition.Y-control.Top+3;
   }
  }
  private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
  {
   if(this.isDialog)
    return;
   cursor=true;
   p=new Point(e.X,e.Y);
   //location = this.Location;
   //size = this.Size;
   if(e.Button==MouseButtons.Right && e.X>0 && e.X<this.Width - 70  && e.Y>0 && e.Y<22)
   {
    this.ControlMenu.Show(this,new Point(e.X,e.Y));
    return;
   }
   if(e.Button==MouseButtons.Left  && e.X>0 && e.X<26 && e.Y>0 && e.Y<22)
    this.ControlMenu.Show(this,new Point(0,20));
  }
  private void Form1_MouseUp(object sender, MouseEventArgs e)
  {
   if(e.Button!=MouseButtons.Left)
    return;
   cursor=false;
   //三个控制按钮的
   if(e.X>this.Width-24 && e.X<this.Width-6 && e.Y>7 && e.Y<20)
    Close();
   if(this.isDialog)
    return;
   if(e.X>this.Width-57 && e.X<this.Width-48 && e.Y>7 && e.Y<20)
    this.WindowState=FormWindowState.Minimized;
   if(e.X>this.Width-48 && e.X<this.Width-23 && e.Y>7 && e.Y<20)
   {
    if(isMax)
     Restore();
    else
     Max();     
   }
  }
  private void Form1_SizeChanged(object sender, EventArgs e)
  {
   if(this.Size.Width<=20 || this.Size.Height<=20)
    return;
   if(!isMax)
   {
    this.location = this.Location;
    this.size=this.Size;
   }
   //this.PainWindow(g);
  }
  protected override void DefWndProc(ref Message m)
  {
   //MessageBox.Show(m.ToString());
   base.DefWndProc (ref m);
  }

  private void Form1_KeyDown(object sender, KeyEventArgs e)
  {
   if(e.Alt && e.KeyCode==Keys.Space)
    this.ControlMenu.Show(this,new Point(4,22));  
  }
  private void menuClose_Click(object sender, System.EventArgs e)
  {
   Close();
  }
  private void menuMax_Click(object sender, System.EventArgs e)
  {
   Max();
  }
  private void menuMin_Click(object sender, System.EventArgs e)
  {
   this.WindowState=FormWindowState.Minimized;
  }
  private void menuSize_Click(object sender, System.EventArgs e)
  {
   Pen pen = new Pen(Color.Black,4);
   g.DrawLine(pen,new Point(0,0),new Point(0,this.Height));
   g.DrawLine(pen,new Point(0,0),new Point(this.Width,0));
   g.DrawLine(pen,new Point(this.Width,0),new Point(this.Width,this.Height));
   g.DrawLine(pen,new Point(0,this.Height),new Point(this.Width,this.Height));
   this.Cursor = Cursors.SizeAll;
  }
  private void menuMove_Click(object sender, System.EventArgs e)
  {
   Pen pen = new Pen(Color.Black,4);
   g.DrawLine(pen,new Point(0,0),new Point(0,this.Height));
   g.DrawLine(pen,new Point(0,0),new Point(this.Width,0));
   g.DrawLine(pen,new Point(this.Width,0),new Point(this.Width,this.Height));
   g.DrawLine(pen,new Point(0,this.Height),new Point(this.Width,this.Height));
   mouse_event(MouseEvents.MOUSEEVENTF_MOVE,this.Location.X + this.Width/2,this.Location.Y + this.Height/2,0,0);
   //MoveWindow(this.Handle,0,0,this.Width,this.Height,0);
   this.Cursor = Cursors.SizeAll;
  }
  /**//// <summary>
  /// 模拟鼠标事件
  /// </summary>
  /// <param name="dwFlags">鼠标事件的Enum</param>
  /// <param name="dx">X座标</param>
  /// <param name="dy">Y座标</param>
  /// <param name="cButtons"></param>
  /// <param name="dwExtraInfo"></param>
  [DllImport("user32.dll")]
  public static extern void mouse_event (MouseEvents dwFlags,long dx, long dy,long cButtons,long dwExtraInfo);
  /**//// <summary>
  /// 定义模拟鼠标的常数
  /// </summary>
  public enum MouseEvents:uint
  {
   MOUSEEVENTF_LEFTDOWN = 0x2,
   MOUSEEVENTF_LEFTUP = 0x4,
   MOUSEEVENTF_MIDDLEDOWN = 0x20,
   MOUSEEVENTF_MIDDLEUP = 0x40,
   MOUSEEVENTF_MOVE = 0x1,
   MOUSEEVENTF_ABSOLUTE = 0x8000,
   MOUSEEVENTF_RIGHTDOWN = 0x8,
   MOUSEEVENTF_RIGHTUP = 0x10,
  }
  private void Form1_LocationChanged(object sender, EventArgs e)
  {
   if(!isMax)
    location=Location;
  }
  protected override void OnControlAdded(ControlEventArgs e)
  {
   
   if(e.Control.Top<24)e.Control.Top += 24;
   if(e.Control.Left<2)e.Control.Left+=2;
   
   /**//*
   if(e.Control.BackColor.ToKnownColor()==KnownColor.Control)
   {  
     //((MyControl)e.Control).DoPaint();
     //Color c = Color.FromArgb(255,220,226,240);
     //e.Control.BackColor=c;  
     int C = (Win32.GDI.GetPixel((IntPtr)Win32.User.GetWindowDC((IntPtr)0),e.Control.Location.X,e.Control.Location.Y));
     Color c = Color.FromName(C.ToString());
     e.Control.BackColor = c;
   }
   base.OnControlAdded (e);
   */
  }
  private void WuyinMsnForm_Load(object sender, System.EventArgs e)
  {
   this.Height+=22;
   this.Width+=2;
  }
 }
 public class MyControl:Control
 {
  public void DoPaint()
  {
  }
  public void DoPaint(PaintEventArgs e)
  {
   if(this.GetType().ToString()=="System.Windows.Forms.Label")
   {
    e.Graphics.DrawString(this.Text,this.Font,new SolidBrush(this.ForeColor),this.Location,StringFormat.GenericDefault);
    return;
   }
  
   this.BackColor= Color.Empty;
   Brush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(new Point(4,4),new Size(this.Width-8,20)),Color.FromArgb(248,248,248),Color.FromArgb(220,226,240),3600,true);
   e.Graphics.FillRectangle(brush,e.ClipRectangle.X,e.ClipRectangle.Y,e.ClipRectangle.Width,e.ClipRectangle.Height); 
  }
  protected override void OnPaint(PaintEventArgs e)
  {
   //base.OnPaint (e);
   DoPaint(e);
  }
 }
}