VB —万年历实例 (2)

上集中只是显示星期几，不够全面，完善后如下：
1、创建lbl1、lbl2、lbl3、txt1、cmd1、Timer1
2、lbl：“输入年月日（如2000-8-16）：”，设置lbl、txt1、cmd1的字体大小和颜色。Timer1的Enable属性设为False，Interval属性设为：1000。
3、双击cmd1，进入代码编辑窗口，敲入：
Private Sub Timer1_Timer()
Dim c As Date
    c = Time
    lbl3.Caption = CStr(c)
End Sub
——————————————————
Private Sub cmd_Click()
    
   If txt1.Text = "" Then
        MsgBox "请输入年月日！", , "错误！"
        lbl2.Caption = ""
        Exit Sub
    End If
   
    Timer1.Enabled = True
    Dim a, b
        b = Val(txt1.Text)
        a = Weekday(b)
    Select Case a
        Case 1
            lbl2.Caption = "星期日"
        Case 2
            lbl2.Caption = "星期一"
        Case 3
            lbl2.Caption = "星期二"
        Case 4
            lbl2.Caption = "星期三"
        Case 5
            lbl2.Caption = "星期四"
        Case 6
            lbl2.Caption = "星期五"
        Case 7
 &n