*我也是抄別人的，禁止關閉沒什麼問題，當然只要別在程序管理器裡關就行。呵呵

禁止拖動有問題，就是用標題欄左邊的圖示選單，是可以拖動窗體的。

【解決辦法應該是，用this.position來解決吧】

private const int SC_CLOSE = 0xF060; private const int MF_ENABLED = 0x00000000; private const int MF_GRAYED = 0x00000001; private const int MF_DISABLED = 0x00000002; [DllImport("user32.dll", EntryPoint = "GetSystemMenu")] private static extern IntPtr GetSystemMenu(IntPtr hWnd, int bRevert); [DllImport("User32.dll")] public static extern bool EnableMenuItem(IntPtr hMenu, int uIDEnableItem, int uEnable); private void Form1_Load(object sender, EventArgs e) { IntPtr hMenu = GetSystemMenu(this.Handle, 0); EnableMenuItem(hMenu, SC_CLOSE, MF_DISABLED | MF_GRAYED); } protected override CreateParams CreateParams { get { const int CS_NOCLOSE = 0x200; CreateParams cp = base.CreateParams; cp.ClassStyle = cp.ClassStyle | CS_NOCLOSE; return cp; } } protected override void WndProc(ref Message m) { base.WndProc(ref m); if (m.Msg == 0x84 && m.Result == (IntPtr)2) // 不讓拖動標題欄 { m.Result = (IntPtr)1; } if (m.Msg == 0xA3) // 雙擊標題欄無反應 { m.WParam = System.IntPtr.Zero; } }