running code from an unbound control when the value changes

[causeidm]

Ok, I have a text box that is populated by the total on a sub form, then I

have another text box that is populated by the difference of the total amount

less the amount from another text box. that all works perfectly. what isn't

working is I have a label that is suppose to set to visible or invisible

based on whether the difference is positive or negative.

the code works great, i set it to run on focus, so when i click on it, works

like a charm. But what I can't do is get it to run when the text box value

changes. I tried on change and after update, but that only seems to work if

I changed the value in the text box, since this is all automated, i need it

to change on it's own.

how do i do this?