class EditField : public Ctrl, private TextArrayOps {
public:
	virtual void  Layout();
	virtual void  Paint(Draw& draw);
	virtual void  LeftDown(Point p, dword keyflags);
        ... omitted
	virtual void   State(int);
	

        // newly introduced
	virtual Size   GetReducedSize()const{
              // EditField::GetReducedSize() should just return GetSize();
              // it's the WithSpin derived class that should override this
              // function to reserve room for SpinButtons.
              //
              // here we reduce it as if allocating space for SpinButtons
              Size sz = GetSize();
              sz.cx -= 30;
              if(sz.cx < 0)
                   sz.cx=0;
              return sz;
         }[/b]
...