I use the dispatchtimer with wpf applications. Here a short example.
Rename Window to MainWindow, add a checkbox.
Class Window1
Dim WithEvents MyTimer As New System.Windows.Threading.DispatcherTimer
Dim n As Integer = 0
Private Sub CheckBox1_Checked(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles CheckBox1.Checked, CheckBox1.Unchecked
' Combined Checked and UnChecked event.
If CheckBox1.IsChecked Then
MyTimer.Start()
Else
MyTimer.Stop()
n = 0
End If
End Sub
Private Sub MyTimer_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyTimer.Tick
n += 1
MainWindow.Title = n.ToString
End Sub
Private Sub MainWindow_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles MainWindow.Loaded
MyTimer.Interval = New TimeSpan(500000) ' 50 ms, 100 ns/bit
End Sub
End Class
Note also how to handle the Checkbox Check event, there is no CheckChanged event in wpf.
In Windows Form Application you write like below:
Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged
If CheckBox1.Checked Then
' To something when checked....
Else
' To something when unchecked....
End If
End Sub
In wpf you have to combine two events, .Checked and .Unchecked. The property .Checked is in wpf replaced with .IsChecked.
