Report from Data Source variable

Apologies, this is probably a simple question, but I have searched the help and tried different things and can't work it out.

I am building a Data Source from a query that is built from user prompts in a window.

dsReport is Data Source
sqlCommand is string     // Build sqlCommand from user input
HExecuteSQLQuery(dsReport,sqlCommand)
iPintReport(reportName)     // now I want to design the report to run here

I want to design a report based upon that data source, but since it does not exist when I am in the report designer how can I link the items to individual fields in the data source?

Gary