>>This is the first time in this application I've run into a field that's too large to display. The column is 700 wide, the grid is 600, and I can't widen the grid any more. I thought the horizontal scroll bar would let me see the whole field, but it's not. What am I doing wrong? How can I scroll to see the entire contents of the field?
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>What do you have in this field?

It's a string of characters representing attendance. The purpose of the grid is visual inspection, both sequentially (day to day) and vertically (all students in class or all of one student's classes). That's why the grid needs to scroll in unison, and Borislav and William's suggestions won't work.