FpSpread1.Sheets.Count = 3;
private void FpSpread1ActiveSheetChanged(object sender, System.EventArgs e)
{
TextBox1.Text = FpSpread1.ActiveSheetViewIndex.ToString();
}
FpSpread1.Sheets.Count = 3
Private Sub FpSpread1ActiveSheetChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles FpSpread1.ActiveSheetChanged
TextBox1.Text = FpSpread1.ActiveSheetViewIndex.ToString()
End Sub