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:


private void Form1_MouseDown( object sender, System.Windows.Forms.MouseEventArgs e)
{
ReleaseCapture();
SendMessage( this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
}

本文转自94cool博客园博客，原文链接：http://www.cnblogs.com/94cool/archive/2009/08/25/1553809.html，如需转载请自行联系原作者