Sub SetFormula( _
   ByVal row As Integer, _
   ByVal column As Integer, _
   ByVal value As String _
) 

Dim instance As IExpressionSupport
Dim row As Integer
Dim column As Integer
Dim value As String
 
instance.SetFormula(row, column, value)

void SetFormula( 
   int row,
   int column,
   string value
)

FarPoint.Win.Spread.Model.IExpressionSupport ems;
ems = (FarPoint.Win.Spread.Model.IExpressionSupport)fpSpread1.ActiveSheet.Models.Data;
fpSpread1.ActiveSheet.SetValue(0, 0, 5);
fpSpread1.ActiveSheet.SetValue(1, 0, 5);
ems.SetFormula(2, 0, "SUM(A1, A2)")
Label1.Text = "The formula is " + ems.GetFormula(2, 0).ToString();

Dim ems As FarPoint.Win.Spread.Model.IExpressionSupport
ems = FpSpread1.ActiveSheet.Models.Data
FpSpread1.ActiveSheet.SetValue(0, 0, 5)
FpSpread1.ActiveSheet.SetValue(1, 0, 5)
ems.SetFormula(2, 0, "SUM(A1, A2)")
Label1.Text = "The formula is " & ems.GetFormula(2, 0).ToString()