Validation rule for text box

[crisis2007]

I am trying to limit the input in a text box. It is for event numbers that are supposed to be in the following format: 11-12345. I need the hyphen in the number after the first two digits. There can be 1-5 digits after the hyphen. I just can't find exactly what I am looking for.

 

[crisis2007]

Disregard this question - I figured it out. I used:

AA"-"aaaaa
in the input mask as well as:

Is Null Or Not Like "*[!0-9-]*"
in the validation rule of the text box. It took care of the problems I had with extra hyphens and letters that users would input.

At least my testing so far using this seems to work.......