Creating an 'All' param in CR11

Hi,

I am trying to utilise Crystal more in my applications and have come a little stuck with an issue.

I am using a parameter, which returns values from a table.

I want the user to be able to select one to report on, but I also want to add an 'All', which will report on all items.

E.g.

Param List = All, Consultant, Local Advert, Ex-Patient.

If the user selects consultant, they will see only those records linked to a consultant. If they choose All, they will see everything.

In the past I have processed all of the above in VB, then created a new table, then link CR to that new table. This time I am trying to let Crystal drive the reporting...

Any ideas or comments?

Cheers

Mark