'Timers are the backbone in any good application,
'you will be able to decide when things will happen in millisecounds
'by using timers and counters you gain control

Public Class Form1
    Inherits System.Windows.Forms.Form

    'declare counter as integer
    Dim counter As Integer

    Private Sub Form1_Load(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles MyBase.Load
        Timer1.Enabled = False 'disable timer at startup
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click
        Timer1.Enabled = True   'starts the timer by enabling it
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button3.Click
        Timer1.Enabled = False  'stops the timer by disabling it
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button2.Click
        counter = 0             'reset the counter
        TextBox1.Text = 0
    End Sub

    'The timer procedure
    'the timer procedure will loop in the intervall of the timer
    'I have set the timer interval in the "properties" menu to 1000 ms (1 sec)
    Private Sub Timer1_Tick(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Timer1.Tick
        counter = counter + 1   'we set the counter to count here
        TextBox1.Text = counter    'write the counter value out as text
    End Sub

End Class