Function GetTag( _
   ByVal row As Integer, _
   ByVal column As Integer _
) As Object

Dim instance As ISheetDataModel
Dim row As Integer
Dim column As Integer
Dim value As Object
 
value = instance.GetTag(row, column)

object GetTag( 
   int row,
   int column
)

private void ChangeDataModel(FarPoint.Web.Spread.FpSpread ss, FarPoint.Web.Spread.Model.ISheetDataModel isd)
{
    isd.SetTag(0, 0, "Test Tag");
    ss.ActiveSheetView.DataModel = (FarPoint.Web.Spread.Model.ISheetDataModel)isd;
    string s;
    s = isd.GetTag(0, 0);
    Response.Write("The tag for the cell is " + s);
}

private void PageLoad(object sender, System.EventArgs e)
{
    ChangeDataModel(FpSpread1, FpSpread1.ActiveSheetView.DataModel);    
}

Private Sub ChangeDataModel(ByVal ss As FarPoint.Web.Spread.FpSpread, ByVal isd As FarPoint.Web.Spread.Model.ISheetDataModel)
    isd.SetTag(0, 0, "Test Tag")
    ss.ActiveSheetView.DataModel = isd
    Dim s As String
    s = isd.GetTag(0, 0)
    Response.Write("The tag for the cell is " & s)
End Sub

Private Sub PageLoad(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    ChangeDataModel(FpSpread1, FpSpread1.ActiveSheetView.DataModel)
End Sub