Some questions on Crystal report's dynamic parameters

With respect to the thread [How can we use C# to read dynamic parameter's value list from .rpt?|How can we use C# to read dynamic parameter's value list from .rpt?].

I have some further questions:

1.How can one differentiate between a Static or Dynamic parameter in a report document using c# code?

2.Is there a way to know what the data source for the dynamic field is, I mean can we know the name of the table which is set to the dynamic field to pull data from?

3. Is there any Report Application Server (RAS) API that allows us to work with dynamic parameter in a report document?

Thanks,

Qin