In Visual Studio I have created a class library with a number of different classes that I want to use in different projects. I have created a windows application - language is C#. I want to use the class library that I have created. Do I need to place the DLL file in a specific folder and how do I add a reference to this library in my C# form. I know it's simple but I can not find the syntax for using external libraries anywhere.<BR>thanks for any help.