>It's a very curious behavior, thanks for bringing this up.
I found this by accident; I had copied the TextBox from another form, and it happened to have the ControlSource, which in the original was tied to an actual field.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)