Hi every body, Sandeep here.I'm a very big fan for .net applications. I'm have zeal to know new types of programming. In this process i came to know that "the code project" is a very good website to achive my goal. Here my question is : Recently i took one source code on c# application. having so many files including ".dll" files also. Now i need to use these .dll files in my application. Can i use or not. is it a legal thing or not. Pls mail me regarding to my question above stated. my communication mail id is : sandeepgrt@gmail.com Expecting response from all......................