struct Column1Display : Display {
	virtual void Paint(Draw& w, const Rect& r, const Value& q, Color ink, Color paper, dword style) const
	{
		w.DrawRect(r, Color(500,0,0));
	}
};

struct Column2Display : Display {
	virtual void Paint(Draw& w, const Rect& r, const Value& q, Color ink, Color paper, dword style) const
	{
		w.DrawRect(r, Color(0,500,0));
	}
};

MyApp::MyApp()
{
//.....
//.....

MyArray.AddColumn("Column 1").SetDisplay(Single<Column1Display>());
MyArray.AddColumn("Column 2").SetDisplay(Single<Column2Display>());

}