主题：TabControl控件怎么能用计时器控制，不隐藏的页面循环显示

编写timertick事件，参考

http://www.foxtable.com/webhelp/scr/1301.htm

Dim tab As WinForm.TabControl = e.form.controls("tabcontrol1")
static idx As Integer = tab.SelectedIndex
Dim flag As Boolean = False
Do While flag = False
    If idx < tab.TabPages.count-1 Then
        If tab.TabPages(idx+1).Visible = True Then
            tab.SelectedIndex = idx+1
            idx += 1
            flag = True
        Else
            idx += 1
        End If
    Else
        idx = -1
    End If
Loop