FormBorderStyle为None的时候如何拖动窗体

 //为DllImport导出命名空间,
 using System.Runtime.InteropServices;
 public partial class Form1 : System.Windows.Forms.Form
 {
 #region FormBorderStyle为None,拖放窗体
 [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;
 private void Form_MouseDown(object sender, MouseEventArgs e)
 {
 ReleaseCapture();
 SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, );
 }
 #endregion
 #region 构造函数
 public Form1()
 {
 //初始化窗体信息
 //InitializeComponent();
 //绑定鼠标拖动窗体事件
 this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Form_MouseDown);
 }
 #endregion
 }

参考：

http://www.dxper.net/thread-2525-1-1.html

http://www.cnblogs.com/rogation/p/3508266.html

DllImport：http://blog.csdn.net/jame_peng/article/details/4387906