在窗体上画一个名称为Command1的命令按钮,然后编写如下事件过程: Private Sub Command1_Click( ) Dim n As Integer For n=0 To 9 Step 3 Print rel(n); Next n End Sub Private Function tel(ByVal i As Integer)As Integer Dim x As Integer x=0 For j=1 To i If i<5 Then rel=i:Exit Function x=x+j Next j rel=x End Function 程序运行后,单击命令按钮,则窗体上显示的内容是______。