using System; 
using System.Windows.Forms; 
using System.Runtime.InteropServices; 

class Test : Form 
{ 
  const int MF_BYPOSITION = 0x0400; 
  const int MF_REMOVE     = 0x1000; 

  [DllImport("user32.dll",EntryPoint="GetSystemMenu")] 
  extern static IntPtr GetSystemMenu(IntPtr hWnd, IntPtr bRevert); 

  [DllImport("user32.dll",EntryPoint="RemoveMenu")] 
  extern static int RemoveMenu(IntPtr hMenu, int nPos, int flags); 

  Test() 
  { 
    Text            =  "不能移动和改变大小的窗口"; 
    FormBorderStyle = FormBorderStyle.FixedSingle; 
    MaximizeBox     = false; 
    MinimizeBox     = false; 
    RemoveMenu(GetSystemMenu(Handle,IntPtr.Zero),1,MF_BYPOSITION|MF_REMOVE); 
  } 

  static void Main() 
  { 
    Application.Run(new Test()); 
  } 
}

------解决方案--------------------
        private const int WM_NCHITTEST = 0x84;
       private const int HTCLIENT = 0x1;
       private const int HTCAPTION = 0x2;
       protected override void WndProc(ref Message m)
       {
           switch (m.Msg)
           {
               case WM_NCHITTEST:
                   base.WndProc(ref m);
                   if ((int)m.Result == HTCLIENT)
                       m.Result = (IntPtr)HTCAPTION;
                   return;
                   break;
           }
           base.WndProc(ref m);
       }

------解决方案--------------------
-_-b
是没标题栏不能移动吧……

按下面的方法，你想要在什么地方移动窗体都行:

C# code


private const int WM_NCLBUTTONDOWN = 0xA1; //消息:左键点击
private const int HT_CAPTION = 0x2; //标题栏
[System.Runtime.InteropServices.DllImport("user32.dll")]
private static extern int SendMessage(System.IntPtr hWnd, int Msg, int wParam, int lParam); //发送消息
[System.Runtime.InteropServices.DllImport("user32.dll")]
private static extern bool ReleaseCapture();


private void Form1_MouseDown(object sender, MouseEventArgs e)
{
  if (e.Button == MouseButtons.Left)
  {
    ReleaseCapture(); //释放鼠标捕捉
    SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0); //发送左键点击的消息至该窗体(标题栏)
  }
}