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调用API

    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;

在空间的_MouseDown中加入如下代码:

    如:

    private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)

   {

    ReleaseCapture();

    SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);

   }