Public Overridable Function OnAddItem( _
   ByVal row As WebComboRow _
) As Boolean

Dim instance As WebCombo
Dim row As WebComboRow
Dim value As Boolean
 
value = instance.OnAddItem(row)

public virtual bool OnAddItem( 
   WebComboRow row
)

public function OnAddItem( 
    row: WebComboRow
): Boolean; virtual; 

public function OnAddItem( 
   row : WebComboRow
) : boolean;

public: virtual bool OnAddItem( 
   WebComboRow* row
) 

public:
virtual bool OnAddItem( 
   WebComboRow^ row
) 

private void WebCombo1_InitializeDataSource(object sender, ISNet.WebUI.WebCombo.DataSourceEventArgs e)
{
    oleDbDataAdapter1.Fill( dsNorthWind1 );
    e.DataSource = dsNorthWind1;
}

protected void OnAddItem(object sender, RowEventArgs e) 
{

    //retrieves the DataSet from internal cache then add new row to it.

    DataSet ds = (DataSet)WebCombo1.GetCachedDataSource();

    DataRow row = ds.Tables[0].NewRow();
    row["CustomerID"] = e.Row.Value;
    row["ContactName"] = e.Row.Value;  

    ds.Tables[0].Rows.Add(row);
}