Determine fields in a report at run time

I am using Crystal XI R2 for reporting ina an a VB.net application.
I want to be able to determine which fields are in a report at run time to provide a list to the user for filtering purposes. I can list the available fields of the database table that the report is hooked into but they might not all be on the report.
Which Objects and/or Methods are used to determine this?
Can someone provide an example?
Thanks ahead of time.

You will have to use the RAS InProc SDK. RAS Developer help files are here:
https://boc.sdn.sap.com/developer/library
Samples:
https://www.sdn.sap.com/irj/boc/businessobjects-samples?rid=/webcontent/uuid/b02c1cac-ad86-2b10-88ae-cb36551bab06 [original link is broken]
Intro article:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/10b840c0-623f-2b10-03b5-9d1913866b32
In a nut shell though, your code would be similar to the below (except for a subreport object, you'd be lookign for a db field object.;
Dim crSections As Sections
Dim crSection As Section
Dim crSubreportObject As SubreportObject
'set the crSections object to the current report's sections
crSections = crReportDocument.ReportDefinition.Sections
'loop through all the sections to find all the report objects
For Each crSection In crSections
crReportObjects = crSection.ReportObjects
'loop through all the report objects to find all the subreports
For Each crReportObject In crReportObjects
If crReportObject.Kind = ReportObjectKind.SubreportObject Then
'you will need to typecast the reportobject to a subreport
'object once you find it
crSubreportObject = CType(crReportObject, SubreportObject)
'open the subreport object
crSubreportDocument = crSubreportObject.OpenSubreport(crSubreportObject.SubreportName)
'set the database and tables objects to work with the subreport
<your .SetDataSource code here>
Next
End If
Next
Ludek
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