Public Shared Function CreateBitmapSourceFromHBitmap ( _
    bitmap As IntPtr, _
    palette As IntPtr, _
    sourceRect As Int32Rect, _
    sizeOptions As BitmapSizeOptions _
) As BitmapSource

Dim bitmap As IntPtr
Dim palette As IntPtr
Dim sourceRect As Int32Rect
Dim sizeOptions As BitmapSizeOptions
Dim returnValue As BitmapSource

returnValue = Imaging.CreateBitmapSourceFromHBitmap(bitmap, _
    palette, sourceRect, sizeOptions)

public static BitmapSource CreateBitmapSourceFromHBitmap(
    IntPtr bitmap,
    IntPtr palette,
    Int32Rect sourceRect,
    BitmapSizeOptions sizeOptions
)

public:
static BitmapSource^ CreateBitmapSourceFromHBitmap(
    IntPtr bitmap, 
    IntPtr palette, 
    Int32Rect sourceRect, 
    BitmapSizeOptions^ sizeOptions
)

public static function CreateBitmapSourceFromHBitmap(
    bitmap : IntPtr, 
    palette : IntPtr, 
    sourceRect : Int32Rect, 
    sizeOptions : BitmapSizeOptions
) : BitmapSource

You cannot use methods in XAML.