extern wxSize WXDLLIMPEXP_CORE wxGetDisplaySize();
extern void WXDLLIMPEXP_CORE wxDisplaySizeMM(int *width, int *height);
extern wxSize WXDLLIMPEXP_CORE wxGetDisplaySizeMM();
+extern wxSize WXDLLIMPEXP_CORE wxGetDisplayPPI();
// Get position and size of the display workarea
extern void WXDLLIMPEXP_CORE wxClientDisplayRect(int *x, int *y, int *width, int *height);