how to:Authenticate,create users, upload download C++ programs, compile them and display back result

hi , I am really in a fix please help me... I am developing a web application where students will upload their C files, then they are compiled run with existing input and the obtained output is loaded back. also we need to maintain this database. I am able to develop a console application using System.Diagnostics where I can compile and generate outputfile but how to link or integrate this with the authentication module and fileupload download module and report generation module. Please suggest some online freely available step by step tutorials downloadable using ASP.net and C# with Visual studio.net. thanking you, Raghu [email protected]