using System.Runtime.InteropServices;

[DllImport("user32.dll")]

    public static extern bool ReleaseCapture();

    [DllImport("user32.dll")]

    public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

    public const int WM_SYSCOMMAND = 0x0112;

    public const int SC_MOVE = 0xF010;

    public const int HTCAPTION = 0x0002;

MouseDown事件中加入如下代码:

private

 

void

 Form1_MouseDown(

object

 sender, System.Windows.Forms.MouseEventArgs e)

  {

   ReleaseCapture();

   SendMessage(

this

.Handle, WM_SYSCOMMAND, SC_MOVE 

+

 HTCAPTION, 

0

);

  }