Changer le background d'un groupbox avec un OpenFileDialog

Bonjour,
je voudrais pouvoir changer le back ground d'un groupbox mais j'ai des problèmes, je ne sais pas comment utilise la fonction BackgroundImage
Voici mon code pour open file dialog

Code:

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        Dim myStream As Stream
        Dim openFileDialog1 As New OpenFileDialog()
        openFileDialog1.InitialDirectory = "c:\"
        openFileDialog1.Filter = "Images (*.jpg)|*.jpg|All files (*.*)|*.*"
        openFileDialog1.FilterIndex = 2
        openFileDialog1.RestoreDirectory = True
 
 
        If openFileDialog1.ShowDialog() = DialogResult.OK Then
            myStream = openFileDialog1.OpenFile()
            If Not (myStream Is Nothing) Then
                myStream.Close()
            End If
        End If

Merci de votre aide :ccool:

Code:

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If openFileDialog1.ShowDialog() = DialogResult.OK Then
    x.BackgroundImage = system.drawing.image.fromfile(openFileDialog1.filename)
End If

Merci !