Lots of ways, but If ... Else are VBA statements so you
would have to use code. Where you place the code ddepends
on what you want to do and what condition you're testing
for.
If you're trying to make a text box display differently
according to the value of one or more fields, then maybe you
could get away with using the IIf function.
Be sure to check Help for details on these capabilities and,
if you need additional assistance, post back with a specific
question.