Function EvaluateExpression( _
   ByVal row As Integer, _
   ByVal column As Integer, _
   ByVal expression As Expression _
) As Object

Dim instance As IExpressionSupport2
Dim row As Integer
Dim column As Integer
Dim expression As Expression
Dim value As Object
 
value = instance.EvaluateExpression(row, column, expression)

object EvaluateExpression( 
   int row,
   int column,
   Expression expression
)

FarPoint.Win.Spread.Model.IExpressionSupport ems; 
FarPoint.CalcEngine.Expression one = new FarPoint.CalcEngine.DoubleExpression(1.0); 
FarPoint.CalcEngine.Expression two = new FarPoint.CalcEngine.DoubleExpression(2.0); 
FarPoint.CalcEngine.Expression oneplustwo = new FarPoint.CalcEngine.BinaryOperatorExpression(FarPoint.CalcEngine.BinaryOperatorInfo.AddOperator, one, two); 
ems = (FarPoint.Win.Spread.Model.IExpressionSupport)fpSpread1.ActiveSheet.Models.Data; 
ems.SetExpression(0, 0, oneplustwo); 
FarPoint.CalcEngine.Expression exp;
exp = ems.GetExpression(0, 0);
FarPoint.Win.Spread.Model.IExpressionSupport2 es;
es = (FarPoint.Win.Spread.Model.IExpressionSupport2)fpSpread1.ActiveSheet.Models.Data;
MessageBox.Show("The evaluated expression is " + es.EvaluateExpression(0, 0, exp).ToString());

Dim ems As FarPoint.Win.Spread.Model.IExpressionSupport
Dim one As FarPoint.CalcEngine.Expression
Dim two As FarPoint.CalcEngine.Expression
Dim oneplustwo As FarPoint.CalcEngine.Expression
one = New FarPoint.CalcEngine.DoubleExpression(1.0)
two = New FarPoint.CalcEngine.DoubleExpression(2.0)
oneplustwo = New FarPoint.CalcEngine.BinaryOperatorExpression(FarPoint.CalcEngine.BinaryOperatorInfo.AddOperator, one, two)
ems = FpSpread1.ActiveSheet.Models.Data
ems.SetExpression(0, 0, oneplustwo)
Dim exp As FarPoint.CalcEngine.Expression
exp = ems.GetExpression(0, 0)
Dim es As FarPoint.Win.Spread.Model.IExpressionSupport2
es = FpSpread1.ActiveSheet.Models.Data
MessageBox.Show("The evaluated expression is " & es.EvaluateExpression(0, 0, exp).ToString())