WPF窗体去掉最大化，最小化按钮。

[DllImport("user32.dll", EntryPoint = "GetWindowLong")]
        public static extern int GetWindowLong(IntPtr hwnd, int nIndex);
        [DllImport("user32.dll", EntryPoint = "SetWindowLong")]
        public static extern int SetWindowLong(IntPtr hMenu, int nIndex, int dwNewLong);
        [DllImport("user32.dll")]
        private static extern int SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, int uFlags);

private void DisableMaxmizebox(bool isDisable)
        {
            int GWL_STYLE = -16;
            int WS_MAXIMIZEBOX = 0x00010000;
            int WS_MINIMIZEBOX = 0x00020000;
            int SWP_NOSIZE = 0x0001;
            int SWP_NOMOVE = 0x0002;
            int SWP_FRAMECHANGED = 0x0020;
            IntPtr handle = new WindowInteropHelper(this).Handle;
            int nStyle = GetWindowLong(handle, GWL_STYLE);
            if (isDisable)
            {
                nStyle &= ~(WS_MAXIMIZEBOX);
                nStyle &= ~(WS_MINIMIZEBOX);
            }
            else
            {
                nStyle |= WS_MAXIMIZEBOX;
                nStyle |= WS_MINIMIZEBOX;
            }
            SetWindowLong(handle, GWL_STYLE, nStyle);
            SetWindowPos(handle, IntPtr.Zero, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE | SWP_FRAMECHANGED);
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            DisableMaxmizebox(true);
        }