Hello Hamad
I found your post in an incorrect Space, so I moved it to the SAP Crystal Reports, version for Visual Studio SCN Space.
I think the best place to start is with a could of sample apps that can be found here:
http://wiki.sdn.sap.com/wiki/x/JQBmBQ
Particularly look at the web parameter samples (discrete params, range, etc.).
- Ludek
Follow us on Twitter
Got Enhancement ideas? Try the SAP Idea Place