Please Help! How do I add a class to another class in another file

Sunny, I'm just a beginner in C# but I stumbled upon some information that may get you where you need to be. The perfCounter application has an example where they are doing something similar to what you want to do. In this applicaiton, they created a separate namespace called Win32Util. This namespace contains a class called Win32Window. This class is used in the other namespace that contains their main. So in the namespace called perfCounter they have a using stamement : using Win32Util; The class Form1 follows this statement and it contains references to the Win32Window class. Of course all of these namespace files are included in the solution using Visual Studio. Hope this make since! Good Luck. Perhaps a C# Guru will be able to shed more light.