![]() ![]() Windows 10 should automatically detect your keyboard and re-install its driver. Note: If you see multiple instances of HID Keyboard Device, remove all of them.ĥ. Select Uninstall to remove your keyboard. Update 2: You should also set ShowInTaskBar=false on w to prevent it from flashing briefly in the taskbar when shown.4. Thanks to Ivan Onuchin over on MSDN forums for the solution. You can even set this.Owner = null if you want the window to reappear in the Alt+ ↹Tab dialog. Works great, and only involves creating one extra (and invisible) window. Whenever I want a window to exhibit this behavior, I simply set this.Owner = App.OwnerWindow. Update: Ok so what I did was move the above code, minus the this.Owner = w bit (and moving w.Hide() immediately after w.Show(), which works fine) into my application's constructor, creating a public static Window called OwnerWindow. I suppose you could create a single window 'w' and reuse it for all windows in your app that need to be hidden from the Alt+ ↹Tab. W.Hide() // Hide helper window just in caseĪ more general, reusable solution would be nice. This.Owner = w // Okey, this will result to disappear icon for main window. W.Show() // We need to show window before set is as owner to our main window W.WindowStyle = WindowStyle.ToolWindow // Set window style as ToolWindow to avoid its icon in AltTab W.Width = 1 // size of window is enough small to avoid its appearance at the beginning W.Top = -100 // Location of new window is outside of visible part of screen So far this is the only thing I've tried that actually works: Window w = new Window() // Create helper window I've found a solution, but it's not pretty. Public static extern void SetLastError(int dwErrorCode) Private static int IntPtrToInt32(IntPtr intPtr) Private static extern Int32 IntSetWindowLong(IntPtr hWnd, int nIndex, Int32 dwNewLong) Private static extern IntPtr IntSetWindowLongPtr(IntPtr hWnd, int nIndex, IntPtr dwNewLong) If ((result = IntPtr.Zero) & (error != 0)) Result = IntSetWindowLongPtr(hWnd, nIndex, dwNewLong) Int32 tempResult = IntSetWindowLong(hWnd, nIndex, IntPtrToInt32(dwNewLong)) Win32 SetWindowLong doesn't clear error on success Public static IntPtr SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong) Public static extern IntPtr GetWindowLong(IntPtr hWnd, int nIndex) Also, unfortunately the SetWindowLongPtr entry point is not found in user32.dll on Windows XP, hence the trick with routing the call through the SetWindowLong instead. I've removed all unnecessary styles from the enums, just to keep the sample code here small. SetWindowLong(wndHelper.Handle, (int)GetWindowLongFields.GWL_EXSTYLE, (IntPtr)exStyle) Īnd the Win32 interop declarations. Int exStyle = (int)GetWindowLong(wndHelper.Handle, (int)GetWindowLongFields.GWL_EXSTYLE) ĮxStyle |= (int)ExtendedWindowStyles.WS_EX_TOOLWINDOW WindowInteropHelper wndHelper = new WindowInteropHelper(this) The event handler itself is very simple: private void Window_Loaded(object sender, RoutedEventArgs e) We can't do that work in the constructor, as there's no window handle at that point yet. We also add a handler to the Loaded event where we will modify the extended window style. Nothing too fancy here, we just declare a window with WindowStyle=None and ShowInTaskbar=False. Here's the sample code for the Win32 interop solution approach. ![]() Then again, I do some advanced stuff like extending the glass in the client area and enabling WPF drawing in the caption anyway, so a little bit of interop is not a big problem. modify the window style to also include the WS_EX_TOOLWINDOW extended style.go with the sample code above and make the window a child window of a small hidden tool window. ![]() To have a WPF window with WindowStyle=None that is also hidden from the task switcher, one can either of two ways: On the other hand, you can remove these two styles by setting WindowStyle=None, however that will not set the WS_EX_TOOLWINDOW extended style and the window will not be hidden from the task switcher. Unfortunately, WPF does not support as flexible control over the window style as Win32, thus a window with WindowStyle=ToolWindow ends up with the default WS_CAPTION and WS_SYSMENU styles, which causes it to have a caption and a close button. to make it a child window of another window.to add the WS_EX_TOOLWINDOW extended window style - that's the right approach.There are two ways of hiding a window from the task switcher in Win32 API: (I haven't tested this yet, but nevertheless decided to bump the comment visibility) ShowInTaskbar="False" and Visibility="Hidden" in the XAML. Update: Īccording to modern days WPF supports this natively, through setting ![]()
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