Problem regarding crystal report relative path

I am developing application in c#.net and I am using crystal reports.
I want to dynamically load crystal report in report document so that from the same form I can access all the reports. for this i am using

ReportDocument rept=new ReportDocument();
rept.Load("genebank.inventory_display");

using Asp.net we can write server.MapPath(@"genebank/inventory_display")
to get path of crystal report.what is the way to specify relative path of crystal report in windows application.