Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) _
  Handles Button2.Click
 
        Using frmSelectCol As New frmSelectColumns
 
            With frmSelectCol
                .dgv = dgv
                If .ShowDialog = Windows.Forms.DialogResult.Cancel Then Exit Sub
                dgv = .dgv
            End With
 
        End Using
 
    End Sub