private static ImageSource GetDefaultIcon(IntPtr hwnd)
{
if (hwnd != IntPtr.Zero)
{
try
{
#pragma warning disable 618
var zero = NativeMethods.SendMessage(hwnd, WM.GETICON, new IntPtr(2), IntPtr.Zero);
if (zero == IntPtr.Zero)
{
zero = NativeMethods.GetClassLong(hwnd, -34);
}
if (zero == IntPtr.Zero)
{
zero = NativeMethods.LoadImage(IntPtr.Zero, new IntPtr(0x7f00), 1, (int)SystemParameters.SmallIconWidth, (int)SystemParameters.SmallIconHeight, 0x8000);
}
if (zero != IntPtr.Zero)
{
return(BitmapFrame.Create(Imaging.CreateBitmapSourceFromHIcon(zero, Int32Rect.Empty, BitmapSizeOptions.FromWidthAndHeight((int)SystemParameters.SmallIconWidth, (int)SystemParameters.SmallIconHeight))));
}
#pragma warning restore 618
}
catch
{
return(null);
}
}
return(null);
}
private static ImageSource GetDefaultIcon(IntPtr hwnd, Size desiredSize)
{
#pragma warning disable CS0219 // Variable is assigned but its value is never used
// Retrieve the small icon for the window.
const int ICON_SMALL = 0;
// Retrieve the large icon for the window.
const int ICON_BIG = 1;
// Retrieves the small icon provided by the application. If the application does not provide one, the system uses the system-generated icon for that window.
const int ICON_SMALL2 = 2;
// Retrieves a handle to the icon associated with the class.
const int GCL_HICON = -14;
// Retrieves a handle to the small icon associated with the class.
const int GCL_HICONSM = -34;
// Shares the image handle if the image is loaded multiple times. If LR_SHARED is not set, a second call to LoadImage for the same resource will load the image again and return a different handle.
const int LR_SHARED = 0x00008000;
#pragma warning restore CS0219 // Variable is assigned but its value is never used
if (hwnd == IntPtr.Zero)
{
return(null);
}
try
{
#pragma warning disable 618
var iconPtr = NativeMethods.SendMessage(hwnd, WM.GETICON, new IntPtr(ICON_SMALL), IntPtr.Zero);
if (iconPtr == IntPtr.Zero)
{
iconPtr = NativeMethods.GetClassLong(hwnd, GCL_HICONSM);
}
if (iconPtr == IntPtr.Zero)
{
iconPtr = NativeMethods.LoadImage(IntPtr.Zero, new IntPtr(0x7f00) /*IDI_APPLICATION*/, 1, (int)desiredSize.Width, (int)desiredSize.Height, LR_SHARED);
}
if (iconPtr != IntPtr.Zero)
{
var bitmapFrame = BitmapFrame.Create(Imaging.CreateBitmapSourceFromHIcon(iconPtr, Int32Rect.Empty, BitmapSizeOptions.FromWidthAndHeight((int)desiredSize.Width, (int)desiredSize.Height)));
return((ImageSource)bitmapFrame.GetAsFrozen());
}
#pragma warning restore 618
}
catch
{
// ignored
}
return(null);
}
