尝试这个：
public partial class MainWindow : Window
{
[DllImport("user32.dll")]
static extern IntPtr GetSystemMenu(IntPtr hWnd,bool bRevert);
[DllImport("user32.dll")]
static extern bool EnableMenuItem(IntPtr hMenu,uint uIDEnableItem,uint uEnable);
const uint MF_BYCOMMAND = 0x00000000;
const uint MF_GRAYED = 0x00000001;
const uint MF_ENABLED = 0x00000000;
const uint SC_CLOSE = 0xF060;
const int WM_SHOWWINDOW = 0x00000018;
const int WM_CLOSE = 0x10;
public MainWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender,RoutedEventArgs e)
{
}
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
HwndSource hwndSource = PresentationSource.FromVisual(this) as HwndSource;
if (hwndSource != null)
{
hwndSource.AddHook(new HwndSourceHook(this.hwndSourceHook));
}
}
IntPtr hwndSourceHook(IntPtr hwnd,int msg,IntPtr wParam,IntPtr lParam,ref bool handled)
{
if (msg == WM_SHOWWINDOW)
{
IntPtr hMenu = GetSystemMenu(hwnd,false);
if (hMenu != IntPtr.Zero)
{
EnableMenuItem(hMenu,SC_CLOSE,MF_BYCOMMAND | MF_GRAYED);
}
}
else if (msg == WM_CLOSE)
{
handled = true;
}
return IntPtr.Zero;
}
}
确保将ResizeMode设置为NoResize.
