// ----------------------------------------------------------------------------
// Creates a bitmap with transparent areas drawn in the given colour.
-wxBitmap wxCreateMaskedBitmap(const wxBitmap& bitmap, wxColour& colour);
+wxBitmap wxCreateMaskedBitmap(const wxBitmap& bitmap, const wxColour& colour);
// ----------------------------------------------------------------------------
// key events related functions
extern void wxDoChangeBackgroundColour(WXWidget widget,
wxColour& backgroundColour,
bool changeArmColour = false);
-extern void wxDoChangeFont(WXWidget widget, wxFont& font);
+extern void wxDoChangeFont(WXWidget widget, const wxFont& font);
extern void wxGetTextExtent(WXDisplay* display, const wxFont& font,
double scale,
const wxString& string, int* width, int* height,