Sharepoint: Create and deploy webpart

Refer following link to create and deploy webparts. Really it will be very useful to you.

http://msdn.microsoft.com/en-us/library/ms916839.aspx

http://www.codeproject.com/KB/sharepoint/BasicWebPartPartII.aspx

http://leedale.wordpress.com/2007/05/31/deploying-a-webpart-solution-in-sharepoint-2007-the-simple-way/

http://unboxedsolutions.com/sean/articles/356.aspx