Public Sub AddUnboundRows( _
   ByVal row As Integer, _
   ByVal count As Integer _
) 

Dim instance As DefaultSheetDataModel
Dim row As Integer
Dim count As Integer
 
instance.AddUnboundRows(row, count)

public void AddUnboundRows( 
   int row,
   int count
)

FarPoint.Win.Spread.Model.DefaultSheetDataModel dataModel = new FarPoint.Win.Spread.Model.DefaultSheetDataModel(5, 5);
dataModel.AddCustomName("TWICESUM", "2*SUM(A1,A2)", 1, 1);
dataModel.SetFormula(1, 1, "TWICESUM");
dataModel.SetValue(0, 0, 10);
dataModel.SetValue(1, 0, 10);
fpSpread1.ActiveSheet.Models.Data = dataModel;

Dim ds As New DataSet()
Dim emp As New DataTable("Employees")
Dim div As New DataTable("Division")
emp.Columns.Add("LastName")
emp.Columns.Add("FirstName")
emp.Rows.Add(New Object() {"Jones", "Marianne"})
emp.Rows.Add(New Object() {"Fieldes", "Anna"})
div.Columns.Add("Section")
div.Columns.Add("Specialty")
div.Rows.Add(New Object() {"Finance", "Taxes"})
div.Rows.Add(New Object() {"Mergers", "Legal"})
ds.Tables.AddRange(New DataTable() {emp, div})
Dim dataModel As New FarPoint.Win.Spread.Model.DefaultSheetDataModel()
dataModel.DataSource = ds
dataModel.DataMember = "Division"
dataModel.AddUnboundRows(1, 3)
FpSpread1.ActiveSheet.Models.Data = dataModel