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copied!<p>From <a href="http://www.wpftutorial.net/RemoveIcon.html" rel="nofollow noreferrer">WPFTutorial</a>:</p> <p>How to remove the icon of a WPF window</p> <p><img src="https://www.wpftutorial.net/images/no_icon_window.jpg" alt="alt text"></p> <p>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.</p> <p>The better approach is to use a function provided by the Win32 API to remove the icon.</p> <pre><code>public partial class Window1 : Window { public Window1() { InitializeComponent(); } protected override void OnSourceInitialized(EventArgs e) { IconHelper.RemoveIcon(this); } } </code></pre> <p>A helper class used to remove the icon.</p> <pre><code>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); } } </code></pre>

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