I have an app built using Visual Studio 2005, which can run rpt files. The .rpt files are stored in a particular folder and the db has metadata about the report name, filename, and stored procedure to run for it. When a user runs a report I call the appropriate stored proc to get a DataTable, create a ReportDocument and load the rpt file, SetDataSource() with the DataTable, then display the report in a CrystalReportViewer control.
If my client wants to be able to modify or create their own rpt files, which versions of Crystal Reports do they need to use?
According to http://msdn.itags.org/visual-studio/115695/ , CR 11 Release 2 works. I would thoroughly check this on my end before telling the client, though.