protected:
// initializes the DC for painting on given window; if rect!=NULL, then
// for painting only on the given region of the window
void InitForWin(wxWindow *win, const wxRect *rect);
protected:
// initializes the DC for painting on given window; if rect!=NULL, then
// for painting only on the given region of the window
void InitForWin(wxWindow *win, const wxRect *rect);