Dim m As Integer, s As Integer, ms As Integer, flag As Boolean

Private Sub Command1_Click()

If flag = False Then

Timer1.Interval = 10

flag = True

Else

Timer1.Interval = 0

flag = False

End If

End Sub

Private Sub Command2_Click()

flag = False

Timer1.Interval = 0

m = 0

s = 0

ms = 0

Label1.Caption = "00:00:00"

End Sub

Private Sub Timer1_Timer()

ms = ms + 1

If ms = 100 Then

s = s + 1

ms = 0

End If

If s = 60 Then

m = m + 1

s = 0

End If

Label1.Caption = Format(m, "00:") & Format(s, "00:") & Format(ms, "00")

End Sub