Hi, Christopher,

The way I do it is to get an object reference to the report, and use the SetDataSource method of the report's Database object, like so...

oMyReport.Database.Tables[0].SetDataSource(myDataSet.Tables["firsttable"]);
oMyReport.Database.Tables[1].SetDataSource(myDataSet.Tables["secondtable"]);
oMyReport.Database.Tables[2].SetDataSource(myDataSet.Tables["thirdtable"]);

Does that help?
Kevin