How do I change the current selection?

I want to be able to restrict the user to selecting multiple cells in one column only (i.e. to only be able to make vertical selections of one or more cells). How do I go about doing this? All the objects and properties that appear to be the obvious thing to modify (like MyGrid.Selections.Ranges.ActiveRange) are read-only.

Nevermind. Putting this line of code: If e.Range.Left <> e.Range.Right Then e.Cancel = True into the SelectionChanging event seems to do the trick.