title: DataGridView, BindingSource and sorting in vb.net
body: <p>I am emulating the functionality of an old app in VB.Net.  I have a DataGridView on my form which is bound to a BindingSource.  I have a button on the toolbar which lanuches a sort dialog.  The sort dialog allows sorting by up to 3 columns.  </p>
  
  <p>So I'm building a string from the results of the dialog and setting the BindingSource.Sort property with it.  But this doesn't update my DataGridView.  Am I missing a step - do I need to tell something to refresh?</p>