Wildcard on a numeric field
I have a query that prompts with a parameter box for the field Contributor_ID. Contributor_ID is a numeric field & Key and I use it to allow the user to print a report based on which Contributor_ID value the user enters. This works fine. However, I would like the user to have the option to enter * and then have the report include ALL the contributor IDs. I have done this before on a text field without a problem, however is this not possible on a numeric field as it is not working? I'm trying not to have another version for the ALL option.
If this is not possible, are there any alternatives?
Thank you in advance.