Dim _removeCtrls As New List(Of Control)
        With ElternPictureBox
            For Each ctrl As Control In .Controls
                If TypeOf ctrl Is PictureBox AndAlso (ctrl.Top > 400 and ( _
                  ...)) Then
                    _removeCtrls.Add(ctrl)
                End If
            Next
 
            For Each ctrl In _removeCtrls
                .Controls.Remove(ctrl)
            Next
        End With