下列程序的功能是:当发生窗体的单击事件后,将在窗体上显示"1!+2!+3!+...+10!"的和。完善下列程序。 Private Sub Form_Click( ) Dim s As Long,I As Integer s=0 For i=1 To 10 s=s+ _____ Next i Print s End Sub Private Function fact(ByVal n As Integer)As Long Dim i As Integer,f As Long f=1 For i=2 To n f=f*i Next i _____ End Function