How to remove the icon of a WPF window

时间：2010-09-14 来源：朔月星辰℡

Unfortumately 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);
        }
    }

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);
        }
 
    }

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