FarPoint.Win.Spread.NamedStyle styleCold = new FarPoint.Win.Spread.NamedStyle();
styleCold.BackColor = Color.Red;
styleCold.ForeColor = Color.White;
fpSpread1.ActiveSheet.SetConditionalFormat(0, 0, 2, 2, styleCold, FarPoint.Win.Spread.ComparisonOperator.IsTrue);
fpSpread1.ActiveSheet.Cells[1, 1].Formula = "ISBLANK(A1)";
Dim styleCold As New FarPoint.Win.Spread.NamedStyle
styleCold.BackColor = Color.Red
styleCold.ForeColor = Color.White
FpSpread1.ActiveSheet.SetConditionalFormat(0, 0, 2, 2, styleCold, FarPoint.Win.Spread.ComparisonOperator.IsTrue)
FpSpread1.ActiveSheet.Cells(1, 1).Formula = "ISBLANK(A1)"