winform:
protected override CreateParams CreateParams { get { const int WS_EX_APPWINDOW = 0x40000; const int WS_EX_TOOLWINDOW = 0x80; CreateParams cp = base.CreateParams; cp.ExStyle &= (~WS_EX_APPWINDOW); // 不显示在TaskBar cp.ExStyle |= WS_EX_TOOLWINDOW; // 不显示在Alt-Tab return cp; } }
WPF:
#region Window styles [Flags] public enum ExtendedWindowStyles { // ... WS_EX_TOOLWINDOW = 0x00000080, // ... } public enum GetWindowLongFields { // ... GWL_EXSTYLE = (-20), // ... } [DllImport("user32.dll")] public static extern IntPtr GetWindowLong(IntPtr hWnd, int nIndex); public static IntPtr SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong) { int error = 0; IntPtr result = IntPtr.Zero; // Win32 SetWindowLong doesn't clear error on success SetLastError(0); if (IntPtr.Size == 4) { // use SetWindowLong Int32 tempResult = IntSetWindowLong(hWnd, nIndex, IntPtrToInt32(dwNewLong)); error = Marshal.GetLastWin32Error(); result = new IntPtr(tempResult); } else { // use SetWindowLongPtr result = IntSetWindowLongPtr(hWnd, nIndex, dwNewLong); error = Marshal.GetLastWin32Error(); } if ((result == IntPtr.Zero) && (error != 0)) { throw new System.ComponentModel.Win32Exception(error); } return result; } [DllImport("user32.dll", EntryPoint = "SetWindowLongPtr", SetLastError = true)] private static extern IntPtr IntSetWindowLongPtr(IntPtr hWnd, int nIndex, IntPtr dwNewLong); [DllImport("user32.dll", EntryPoint = "SetWindowLong", SetLastError = true)] private static extern Int32 IntSetWindowLong(IntPtr hWnd, int nIndex, Int32 dwNewLong); private static int IntPtrToInt32(IntPtr intPtr) { return unchecked((int)intPtr.ToInt64()); } [DllImport("kernel32.dll", EntryPoint = "SetLastError")] public static extern void SetLastError(int dwErrorCode); #endregion private void image_Loaded(object sender, RoutedEventArgs e) { WindowInteropHelper wndHelper = new WindowInteropHelper(this); int exStyle = (int)GetWindowLong(wndHelper.Handle, (int)GetWindowLongFields.GWL_EXSTYLE); exStyle |= (int)ExtendedWindowStyles.WS_EX_TOOLWINDOW; SetWindowLong(wndHelper.Handle, (int)GetWindowLongFields.GWL_EXSTYLE, (IntPtr)exStyle); }
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原文链接:https://blog.csdn.net/qq452626100/article/details/52314283