[GD-Windows] WM_SYSCOMMAND documentation question

[Daniel V. <vo...@ep...>]

The D3D sample applications return 1 in response to WM_SYSCOMMAND to prevent
certain events from interfering with the app being fullscreen though I can't
find any documention why 1 is returned. The MSDN docs state that 0 should be
returned if the application handles WM_SYSCOMMAND so I'm wondering where the
return value of 1 is documented.

case WM_SYSCOMMAND:
	// Prevent moving/sizing and power loss in fullscreen mode
	switch( wParam )
	{
		case SC_MOVE:
		case SC_SIZE:
		case SC_MAXIMIZE:
		case SC_KEYMENU:
		case SC_MONITORPOWER:
			if( false == m_bWindowed )
				return 1;
			break;
	}
	break;


Thanks,

-- Daniel, Epic Games Inc.