Thanks, nouzi.
I've seen that site before. And while that's a good example of how to add checkboxes and comboboxes and the like to a grid, it doesn't help me very much in masking the entry.
I'm working on catching that field before it gets written to the db, then, through some hocus-pocus (and a little data manipulation), I think I can add the dashes to phone numbers and then send it on to the db. But that's what I want to avoid. If OnFieldEditMask turns out to be what I think it is, then I just need insight on how to use it.
I'm in a holding pattern right now, though. Thanks again for the suggestion.