// this macro can be used in a wxScrollHelper-derived class to forward wxWindow
// methods to corresponding wxScrollHelper methods
#define WX_FORWARD_TO_SCROLL_HELPER() \
+public: \
virtual void PrepareDC(wxDC& dc) { DoPrepareDC(dc); } \
virtual bool Layout() { return ScrollLayout(); } \
virtual void DoSetVirtualSize(int x, int y) \