I am having a problem in a data entry form, where the value of certain fields is .NULL. The focus immediately moves on to the next control in the tab order without allowing data entry to happen. Changing the NullDisplay property merely makes it look different, which is of course what that is supposed to do.

I was able to enter a null value into a text box that previously contained text, but then could not edit it again to change it back to text.

Hopefully this will not garner a reply such as 'Well, you shouldn't use null values, Jim' :)