Passing Data From VB to SSRS using LocalReport

With Crystal reports, it was easy to pass a single piece of data from VB to a report in a formula field. How do you implement this functionality in SSRS 2005 (I am using VS 2005)?

Seems like this should be commonplace, but I can't seem to find any info on it.

I am using a LocalReport, so a URL is not an option.

Thanks.

For anyone else having this problem:

I have figured it out - you have to create a parameter using the Report - Report Properties menu. Then, you link the parameter to a TextBox on the report. Finally, you can pass data from a client using the LocalReport.SetParameters method.

Never did find any documentation on it. Very obscure.