1 测试代码如下：   
  2   using   System;   
  3   using   System.Drawing;   
  4   using   System.Collections;   
  5   using   System.ComponentModel;   
  6   using   System.Windows.Forms;   
  7   using   System.Data;   
  8     
  9   namespace   WindowsApplication12   
 10   {   
 11   ///   <summary>   
 12   ///   Summary   description   for   Form1.   
 13   ///   </summary>   
 14   public   class   Form1   :   System.Windows.Forms.Form   
 15   {   
 16   private   int   tmpx   =   0;   
 17   private   int   tmpy   =   0;   
 18   private   System.Windows.Forms.PictureBox   pictureBox1;     
 19   ///   <summary>   
 20   ///   Required   designer   variable.   
 21   ///   </summary>   
 22   private   System.ComponentModel.Container   components   =   null;   
 23     
 24   System.Drawing.Rectangle[]   ScreensRect;   
 25     
 26   public   Form1()   
 27   {   
 28   //   
 29   //   Required   for   Windows   Form   Designer   support   
 30   //   
 31   InitializeComponent();   
 32     
 33   //   
 34   //   TODO:   Add   any   constructor   code   after   InitializeComponent   call   
 35   //   
 36   }   
 37     
 38   ///   <summary>   
 39   ///   Clean   up   any   resources   being   used.   
 40   ///   </summary>   
 41   protected   override   void   Dispose(   bool   disposing   )   
 42   {   
 43   if(   disposing   )   
 44   {   
 45   if   (components   !=   null)     
 46   {   
 47   components.Dispose();   
 48   }   
 49   }   
 50   base.Dispose(   disposing   );   
 51   }   
 52     
 53   #region   Windows   Form   Designer   generated   code   
 54   ///   <summary>   
 55   ///   Required   method   for   Designer   support   -   do   not   modify   
 56   ///   the   contents   of   this   method   with   the   code   editor.   
 57   ///   </summary>   
 58   private   void   InitializeComponent()   
 59   {   
 60   this.pictureBox1   =   new   System.Windows.Forms.PictureBox();   
 61   this.SuspendLayout();   
 62   //     
 63   //   pictureBox1   
 64   //     
 65   this.pictureBox1.BackColor   =   System.Drawing.SystemColors.HotTrack;   
 66   this.pictureBox1.Location   =   new   System.Drawing.Point(120,   88);   
 67   this.pictureBox1.Name   =   "pictureBox1";   
 68   this.pictureBox1.Size   =   new   System.Drawing.Size(248,   176);   
 69   this.pictureBox1.TabIndex   =   0;   
 70   this.pictureBox1.TabStop   =   false;   
 71   //     
 72   //   Form1   
 73   //     
 74   this.AutoScaleBaseSize   =   new   System.Drawing.Size(5,   13);   
 75   this.ClientSize   =   new   System.Drawing.Size(504,   357);   
 76   this.Controls.Add(this.pictureBox1);   
 77   this.Name   =   "Form1";   
 78   this.Text   =   "Form1";   
 79   this.MouseDown   +=   new   System.Windows.Forms.MouseEventHandler(this.Form1_MouseDown);   
 80   this.Load   +=   new   System.EventHandler(this.Form1_Load);   
 81   this.MouseUp   +=   new   System.Windows.Forms.MouseEventHandler(this.Form1_MouseUp);   
 82   this.ResumeLayout(false);   
 83     
 84   }   
 85   #endregion   
 86     
 87   ///   <summary>   
 88   ///   The   main   entry   point   for   the   application.   
 89   ///   </summary>   
 90   [STAThread]   
 91   static   void   Main()     
 92   {   
 93   Application.Run(new   Form1());   
 94   }   
 95     
 96   private   void   Form1_MouseDown(object   sender,   System.Windows.Forms.MouseEventArgs   e)   
 97   {   
 98   this.tmpx   =   e.X;   
 99   this.tmpy   =   e.Y;   
100   this.MouseMove   +=   new   System.Windows.Forms.MouseEventHandler(this.form1_MouseMove);   
101     
102   }   
103     
104   private   void   Form1_MouseUp(object   sender,   System.Windows.Forms.MouseEventArgs   e)   
105   {   
106   this.MouseMove   -=   new   System.Windows.Forms.MouseEventHandler(this.form1_MouseMove);   
107     
108   System.Drawing.Rectangle   pictureBox1Rect=Screen.GetWorkingArea(pictureBox1);   
109     
110   for(int   i=0;i<ScreensRect.Length;i++)   
111   {   
112           if(ScreensRect[i].X==pictureBox1Rect.X   &&   ScreensRect[i].Y==pictureBox1Rect.Y)   
113   this.Location=new   Point(ScreensRect[i].X,pictureBox1Rect.Y);   
114   }   
115   //MessageBox.Show("   WorkingArea:"   +   re.ToString());   
116   }   
117   private   void   form1_MouseMove(object   sender,   MouseEventArgs   e)   
118   {   
119   this.Location   =   new   System.Drawing.Point(this.Location.X   +   e.X   -   this.tmpx,   this.Location.Y   +   e.Y   -   this.tmpy);   
120   }   
121     
122   private   void   Form1_Load(object   sender,   System.EventArgs   e)   
123   {   
124   Screen[]   s=Screen.AllScreens;   
125   ScreensRect=new   Rectangle[s.Length];   
126   for(int   i=0;i<s.Length;i++)   
127   {   
128   ScreensRect[i]=   s[i].WorkingArea;   
129   }   
130   }   
131   }   
132   }   
133