I'm working on a report where one of the database fields is a sequential ID set as a string type and in the format of "0000000000". I want to run the report based on a user selected ID, so for the time being I've created a parameter value with a default the same as above, so the user can delete the last few 0's and enter their number.

But is there anyway I can change it so they can just enter the number? So basically what I'm trying to do is:

1. In the default Crystal Parameter screen the user enters a number, such as: {?param} := '1234'
2. Some code converts that to a string and appends the correct number of zero's on front making it: StringVar modParam := "0000001234"
3. In the selection formula I use this new 10 character string to select my records: modParam = {db.ID}

But the record selection formula doesn't like me entering any non-selection specific code in it. I know there are a few functions for determining when to calculate a formula (EvaluateWhilePrinting... etc) but I don't think any of these can apply to the selection formula.

So is there anything I can do or am I out of luck here? It's not that big a deal really but it would be a nice little convenience if I could do this.