Function IsSelected( _
   ByVal row As Integer, _
   ByVal column As Integer _
) As Boolean

Dim instance As ISheetSelectionModel
Dim row As Integer
Dim column As Integer
Dim value As Boolean
 
value = instance.IsSelected(row, column)

bool IsSelected( 
   int row,
   int column
)

FarPoint.Web.Spread.Model.ISheetSelectionModel iss;
iss = (FarPoint.Web.Spread.Model.ISheetSelectionModel)FpSpread1.ActiveSheetView.SelectionModel;
iss.SetSelection(0, 0, 2, 2)
iss.AddSelection(3, 0, 1, 2);
bool b = iss.IsSelected(0, 2);
string msg = "The cell is in a selection is " + b.ToString();
Response.Write("<script language='javascript'>alert('" + msg + "')</script>");

Dim iss As FarPoint.Web.Spread.Model.ISheetSelectionModel
iss = FpSpread1.ActiveSheetView.SelectionModel
iss.SetSelection(0, 0, 2, 2)
iss.AddSelection(3, 0, 3, 2)
Dim b As Boolean = iss.IsSelected(0, 2)
Dim msg As String = "The cell is in a selection is " + b.ToString()
Response.Write("<script language='javascript'>alert('" & msg & "')</script>")