List as a report parameter?

[Cristian]

Hi, I working with telerik reporting Q2 2010, I have a page i wich you select a value from a combobox from 1 to 32, corresponding to country ID's, when the report is generated it shows users from the "country Id" selected in the textbox, my question is if i add an new index to the combobox called "All" that generates the report with users of all the ID's?
Is it possible to do this?
Hope your help.

Best regards
Cristian

[Daniela]

I also need this, do you have it?

Kind Regards,