verifica1 = ( 2 * (double)~alzataEdit ) + pedataEdit ;

EditfieldColour::EditfieldColour()
{
	CtrlLayout(*this, "Window title");

	static EditField::Style sd = ef.StyleDefault();
	sd.paper = Red();
        sd.text = Blue();
        sd.focus = LtRed();
   	ef.SetStyle(sd);
}

//scala.h
class Scala : public WithScalaLayout<TopWindow> {
....
public:
EditDouble::Style s;
EditDouble verifica1;
 
	typedef Scala CLASSNAME;
	virtual void Paint (Draw& draw);
	Scala();
};

//main.cpp
void Scala::color(void)
{
	s = verifica1.StyleDefault();
	if(verifica1 < 62 || verifica1 > 64)
		{
			s.paper = LtRed;
 			s.text = Yellow;
		}
	else
		{
			s.paper = LtGreen;
			s.text = Black;
		}
	verifica1.SetStyle(s);
}