Public Function GetCustomFunction( _
   ByVal name As String _
) As FunctionInfo

Dim instance As DefaultSheetDataModel
Dim name As String
Dim value As FunctionInfo
 
value = instance.GetCustomFunction(name)

public FunctionInfo GetCustomFunction( 
   string name
)

<Serializable()>
    public class CubeFunctionInfo : FarPoint.CalcEngine.FunctionInfo 
    { 
        public override string Name { get { return "CUBE"; } } 
        public override int MinArgs { get { return 1; } } 
        public override int MaxArgs { get { return 1; } } 
        public override object Evaluate (object[] args) 
        { 
            double num = FarPoint.CalcEngine.CalcConvert.ToDouble(args[0]); 
            return num * num * num; 
        } 
    } 
    
private void PageLoad(object sender, System.EventArgs e)
{
    FarPoint.Web.Spread.Model.DefaultSheetDataModel dataModel = new FarPoint.Web.Spread.Model.DefaultSheetDataModel(5, 5); 
    dataModel.AddCustomFunction(new CubeFunctionInfo()); 
    dataModel.SetFormula(1, 1, "CUBE(4)"); 
    FpSpread1.ActiveSheetView.DataModel = dataModel;
    
    FarPoint.CalcEngine.FunctionInfo fi;
    fi = dataModel.GetCustomFunction("CUBE");
    Response.Write(fi.MinArgs.ToString());    
}

<Serializable()> 
Public Class CubeFunctionInfo
   Inherits FarPoint.CalcEngine.FunctionInfo

   Public Overrides ReadOnly Property Name() As String
      Get
         Return "CUBE"
      End Get
   End Property

   Public Overrides ReadOnly Property MinArgs() As Integer
      Get
         Return 1
      End Get
   End Property

   Public Overrides ReadOnly Property MaxArgs() As Integer
      Get
         Return 1
      End Get
   End Property

   Public Overrides Function Evaluate(ByVal args() As Object) As Object
   Dim num As Double = FarPoint.CalcEngine.CalcConvert.ToDouble(args(0))
      Return num * num * num
   End Function

End Class

Private Sub PageLoad(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim dataModel As New FarPoint.Web.Spread.Model.DefaultSheetDataModel(5, 5)
dataModel.AddCustomFunction(New CubeFunctionInfo)
dataModel.SetFormula(1, 1, "CUBE(4)")
FpSpread1.ActiveSheetView.DataModel = dataModel

Dim fi As FarPoint.CalcEngine.FunctionInfo
fi = dataModel.GetCustomFunction("CUBE")
Response.Write(fi.MinArgs.ToString())
End Sub