static BitmapSource GetWindowIcon(IntPtr windowHandle)
{
var hIcon = default(IntPtr);
hIcon = WindowApi.SendMessage(windowHandle, (int)Message.WM_GETICON, WindowApi.ICON_BIG, IntPtr.Zero);
if (hIcon == IntPtr.Zero)
{
hIcon = WindowApi.GetClassLongPtr(windowHandle, WindowApi.GCL_HICON);
}
if (hIcon == IntPtr.Zero)
{
//TODO: define this constant in the api. it's messy in here.
hIcon = WindowApi.LoadIcon(IntPtr.Zero, (IntPtr)0x7F00 /*IDI_APPLICATION*/);
}
if (hIcon != IntPtr.Zero)
{
return(Imaging.CreateBitmapSourceFromHIcon(hIcon, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()));
}
else
{
throw new InvalidOperationException("Could not load window icon.");
}
}
