>I'm trying to determine why the developer before me was using a Textbox and a Checkbox in the same column of the grid. Much of the code is unfinished so searching for references wasn't successful. What might help is to know why two controls might be needed. I have not used more than one before and wondered if others do and why. Thanks!

Usually it's just because the developer didn't know how to delete the default textbox. That's the simplest explanation. And if there isn't any code to set the current control, then it's probably the most likely, too.