class CWindowMaskDelMask;
class CWindowMaskClrMask;
class CWindowMaskButton;
class CWindowMaskThumbler;
class CWindowMaskDelMask;
class CWindowMaskClrMask;
class CWindowMaskButton;
class CWindowMaskThumbler;
class CWindowMaskDrawMarkers;
class CWindowMaskDrawBoundary;
class CWindowMaskDelPoint;
class CWindowMaskDrawMarkers;
class CWindowMaskDrawBoundary;
class CWindowMaskDelPoint;