How to read Crystal Reports Parameters

I am using vs 2010 ,Crystal Reports, VB.Net , ASP.Net 4.0 and Telerik control RADCOMBOBOX.

I what to be able to read a reports parameter values and populate the RADCOMBOBOX with the values of the

Crystal Report Parameters.

How do I read; get access to those report parameters. The parameters for the report may be one to mutiple parameters.

Thanks in advance... I'm under the gun