shermags Newbie Poster 16 posts since Jan 2013 Reputation Points: 6 [?] Q&As Helped to Solve: 0 [?] Skill Endorsements: 0 [?] •Community Member 0 2 Years Ago Hi, I am new with the WPF Browser Application in VB.Net. I would like to know if how can I execute a windows form or a page. I had tried to this code: Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles Button1.Click Dim Form As New Window1 Form.Show() End Sub Unfortunately, I am receiving this error: Upon checking the Security Tab: May I know the reason why I am getting this type for error. By the way, I am using Visual Studio Express 2008. Hoping someone can help me on this. Thank you in advance.