Linda,

>I did that but it didn't change anything. It seems to have something to do with the settings on the grid on the first tab. The grid uses the same dataset as the text boxes on the following tabs. I have tried several different options on the grid but can't find anything that works yet. Is the width on the grid affecting the editable width of the text box?

No, it shouldn't affect it at all. Can you set a breakpoint and see what the MaxLength property of the TextBox is (at the point where it's not allowing you to enter anything)?

Best Regards,