//File:Window.xaml.vb Imports System Imports System.Windows Imports System.Windows.Controls Imports System.Windows.Media Namespace WpfApplication1 Public Partial Class FEMarginProgrammatic Private Sub OnClick(sender As Object, e As RoutedEventArgs) Dim marginThickness As Thickness = btn1.Margin If marginThickness.Left = 10 Then btn1.Margin = New Thickness(60) Else btn1.Margin = New Thickness(10) End If End Sub End Class End Namespace