Get value of a delimited list parameter in a dynamic member

I have a dashboard parameter of type delimited list and I want to get the value from the parameter in a dynamic UD8 member. How do I get the parameter value? If I use the following code I just get the default value of the parameter (because the parameter isn't a literal type):

Dim sValue As String = BRApi.Dashboards.Parameters.GetLiteralParameterValue(si, False, "myParameter")
brapi.ErrorLog.LogMessage(si, "sValue " & sValue)

so I need to use a method other than BRApi.Dashboards.Parameters.GetLiteralParameterValue but have no idea what and don't seem to be able to find any documentation to help find what to use.