Option Explicit

Private Sub Command1_Click()
Timer1.Enabled = True计时器timer1可用

Timer2.Enabled = False 计时器timer2不可用
End Sub

Private Sub Command2_Click()
Timer1.Enabled = False
Timer2.Enabled = True
End Sub

Private Sub Command3_Click()
End
End Sub

Private Sub Form_Load()
Timer1.Enabled = False 计时器timer1不可用
Timer2.Enabled = False 计时器timer2不可用
End Sub

Private Sub Timer1_Timer()
Label1.Caption = Format(Now,"hh:mm:ss AM /PM") 显示12小时制时间

End Sub

Private Sub Timer2_Timer()
Label1.Caption = Time 显示24小时制时间
End Sub