Removing Icon from a WPF window - wpf

Question

I am able to remove the window icon from WPF window using WinApi's, however I get the icon again in the application window when I run just the executable of the WPF project.
How do I remove the icon?

Answer 1

From WPFTutorial:
How to remove the icon of a WPF window
Unfortunately WPF does not provide any function to remove the icon of a window. One solution could be setting the icon to a transparent icon. But this way the extra space between the window border and title remains.
The better approach is to use a function provided by the Win32 API to remove the icon.
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
protected override void OnSourceInitialized(EventArgs e)
{
IconHelper.RemoveIcon(this);
}
}
A helper class used to remove the icon.
public static class IconHelper
{
[DllImport("user32.dll")]
static extern int GetWindowLong(IntPtr hwnd, int index);
[DllImport("user32.dll")]
static extern int SetWindowLong(IntPtr hwnd, int index, int newStyle);
[DllImport("user32.dll")]
static extern bool SetWindowPos(IntPtr hwnd, IntPtr hwndInsertAfter,
int x, int y, int width, int height, uint flags);
[DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hwnd, uint msg,
IntPtr wParam, IntPtr lParam);
const int GWL_EXSTYLE = -20;
const int WS_EX_DLGMODALFRAME = 0x0001;
const int SWP_NOSIZE = 0x0001;
const int SWP_NOMOVE = 0x0002;
const int SWP_NOZORDER = 0x0004;
const int SWP_FRAMECHANGED = 0x0020;
const uint WM_SETICON = 0x0080;
public static void RemoveIcon(Window window)
{
// Get this window's handle
IntPtr hwnd = new WindowInteropHelper(window).Handle;
// Change the extended window style to not show a window icon
int extendedStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
SetWindowLong(hwnd, GWL_EXSTYLE, extendedStyle | WS_EX_DLGMODALFRAME);
// Update the window's non-client area to reflect the changes
SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, SWP_NOMOVE |
SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
}
}

Answer 2

Just add this WindowStyle="ToolWindow" to your window properties.

Answer 3

I have modified the sample from 'LnDCobra' so it can be used as an attached property (as 'Thomas' suggested:
<Window
...
xmlns:i="clr-namespace:namespace-to-WindowEx"
i:WindowEx.ShowIcon = "false"
...
>
Implementation of WindowEx:
public class WindowEx
{
private const int GwlExstyle = -20;
private const int SwpFramechanged = 0x0020;
private const int SwpNomove = 0x0002;
private const int SwpNosize = 0x0001;
private const int SwpNozorder = 0x0004;
private const int WsExDlgmodalframe = 0x0001;
public static readonly DependencyProperty ShowIconProperty =
DependencyProperty.RegisterAttached(
"ShowIcon",
typeof (bool),
typeof (WindowEx),
new FrameworkPropertyMetadata(true, new PropertyChangedCallback((d, e) => RemoveIcon((Window) d))));
public static Boolean GetShowIcon(UIElement element)
{
return (Boolean) element.GetValue(ShowIconProperty);
}
public static void RemoveIcon(Window window)
{
window.SourceInitialized += delegate {
// Get this window's handle
var hwnd = new WindowInteropHelper(window).Handle;
// Change the extended window style to not show a window icon
int extendedStyle = GetWindowLong(hwnd, GwlExstyle);
SetWindowLong(hwnd, GwlExstyle, extendedStyle | WsExDlgmodalframe);
// Update the window's non-client area to reflect the changes
SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, SwpNomove |
SwpNosize | SwpNozorder | SwpFramechanged);
};
}
public static void SetShowIcon(UIElement element, Boolean value)
{
element.SetValue(ShowIconProperty, value);
}
[DllImport("user32.dll")]
private static extern int GetWindowLong(IntPtr hwnd, int index);
[DllImport("user32.dll")]
private static extern IntPtr SendMessage(IntPtr hwnd, uint msg,
IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll")]
private static extern int SetWindowLong(IntPtr hwnd, int index, int newStyle);
[DllImport("user32.dll")]
private static extern bool SetWindowPos(IntPtr hwnd, IntPtr hwndInsertAfter,
int x, int y, int width, int height, uint flags);
}
}

Answer 4

Here a simple and pure XAML solution:
<Window x:Class="...">
<Window.Icon>
<DrawingImage />
</Window.Icon>
...
</Window>

Answer 5

I just use very small transparent image as an icon (1x1 px) for WPF window.

Answer 6

Create a transparent 1 by 1 icon and replace it with a standard one
Icon = BitmapSource.Create(1, 1, 0, 0, PixelFormats.Bgra32, null, new byte[4], 4);