Crystal Reports Read fieldvalue from a report

Message

   I want to read values from a report which is generated by a third application. So the only thing i have is the generated rpt (with saved data). 

What i do is load the rpt in a crystalreportviewer and do a logon and a refresh. The output is a sort of mailmerge. 
What i want to do is extract the emailadres which is in the generated output as a field.
Is there anyone who can tell me how to do this.
(Winform and using C#)

thanks in advance

Richard

Edited by riclo - 11 Nov 2009 at 2:13am