//ea is TexcelApplication
procedure TForm1.Button1Click(Sender: TObject);
var
Sheet : _Worksheet;
begin
ea.Connect ;
ea.Visible[0] := True;
ea.Workbooks.Add(1,1);
ea.Application.Set_StandardFontSize(10, 10);
Sheet := ea.Worksheets.Item[1] as _WorkSheet ;
Sheet.Activate(0);
Sheet.Rows.Item[1,EmptyParam].Interior.Color := clBlue
ea.Disconnect ;
end;