WxPoint

From WxWiki

The value of wxPoint after default construction wxPoint::wxPoint() is (0,0).

The following operators for adding and substracting points are also useful:

   wxPoint operator+(const wxPoint& p)
   wxPoint operator-(const wxPoint& p)

   wxPoint& operator+=(const wxPoint& p)
   wxPoint& operator-=(const wxPoint& p)

   wxPoint& operator+=(const wxSize& s)
   wxPoint& operator-=(const wxSize& s)

   wxPoint operator+(const wxSize& s)
   wxPoint operator-(const wxSize& s)