[UnmanagedFunctionPointer(CallingConvention.StdCall)]
public delegate IntPtr PreFocusChangeEventCallbackDelegate(IntPtr current, IntPtr proposed, View.KeyboardFocus.Direction direction);
[UnmanagedFunctionPointer(CallingConvention.StdCall)]
public delegate IntPtr PreFocusChangeEventCallbackDelegate(IntPtr current, IntPtr proposed, View.KeyboardFocus.Direction direction);