1 public MainWindow()
2 {
3 InitializeComponent();
4 SourceInitialized += OnSourceInitialized;
5 }
6 private void OnSourceInitialized(object sender, EventArgs e)
7 {
8 var handle = (PresentationSource.FromVisual(this) as HwndSource).Handle;
9 var exstyle = User32.GetWindowLong(handle, GWL_EXSTYLE);
10 User32.SetWindowLong(handle, GWL_EXSTYLE, new IntPtr(exstyle.ToInt32() | WS_EX_NOACTIVATE));
11 }
12 public const int WS_EX_NOACTIVATE = 0x08000000;
13 public const int GWL_EXSTYLE = -20;
User32函数：
1 [DllImport("user32.dll", EntryPoint = "GetWindowLong")]
2 public static extern IntPtr GetWindowLong(IntPtr hWnd, int nIndex);
3
4 [DllImport("user32.dll", EntryPoint = "SetWindowLong")]
5 public static extern IntPtr SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong);
