Help with "like" or "wildcard" during a parameter entry.

Disclaimer - I'm a novice when it comes to Crystal Reports as well as VB, and I am using Crystal Reports XI.

My trouble - I have a report that uses a parameter field to show a history of a whatever number is entered into the parameter when the report is accessed. I would like to add a "like" or "wildcard" to this parameter filed.

Example:

Parameter entered = ED35A100

The results are correct I get a history of the number ED35A100

However, I would like to enter the parameter = ED35*

and get results like ED35A100, ED35C100, ED35A200, etc.

Any help on how to accomplish this would be greatly appreciated.maybe this will work...lookslike({Fieldname},"*{?Parameter}*") then go to Report...Select Expert then choose the Fieldname then in the drop down key choose Is True