Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
　　If IsPostBack Then
　　　　Return
　　End If

　　FpSpread1.Sheets.Count = 3
End Sub

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
　　FpSpread1.SaveChanges()

　　FpSpread1.ActiveSheetViewIndex = 1
End Sub

protected void Page_Load(object sender, EventArgs e)
{
　　if (IsPostBack)
　　{
　　　　return;
　　}

　　FpSpread1.Sheets.Count = 3;
}
protected void Button1_Click(object sender, EventArgs e)
{
　　FpSpread1.SaveChanges();

　　FpSpread1.ActiveSheetViewIndex = 1;
}