Changing context menu dynamically

[igorsky]

Hello Guys,

I’m trying to change context menu dynamically depending if the TreeView root is selected I want to use CMnuRoot menu else I want to use CMnuChild menu.
But I’m getting an error: “Object instance is not set to an instance of the object” .

Private Sub TreeView1_MouseDown1(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TreeView1.MouseDown
       	
 If e.Button = MouseButtons.Right and TreeView1.SelectedNode.Parent Is Nothing Then
                Me.CMnuRoot.Show(Me.TreeView1, New Point(e.X, e.Y))
            Else
                Me.CMnuChild.Show(Me.TreeView1, New Point(e.X, e.Y))
        End If
    End Sub

Please help.