Archana,India wrote: RDL files creation is through SQL 2005->Report Designer and RDLC files creation is through VS 2005->Report Designer Yes You are correct..! After This I didnt Get it..! I created Both Types of applictions..! I got very Good help from this forum..! http://social.msdn.microsoft.com/Forums/en-US/sqlreportingservices/threads[^] Archana,India wrote: The missing values can be entered by opening the RDLC file using the SQL Server 2005 version of Report Designe I think You are talking abt parameters they can be left blank in any type of the file ..! What exactly You are trying to develop..! In rdlc files u need to display the files using reportviewer control ..! LatestArticle :Log4Net Why Do Some People Forget To Mark as Answer .If It Helps.