How can we use COM Components in .NET? Twist: What is RCW?

Dot NET components communicate with COM using RCW (Runtime Callable Wrapper). Following are the ways with which you can generate RCW: -Adding reference in Visual Studio.net -Using Type library import tool. Tlbimp.exe yourname.dll -Using interopservices.System.runtime. Interopservices namespace contains class TypeLib Converter which provides methods to convert COM classes and interface in to assembly metadata. -Make your custom wrappers. If your COM component does not have type library then the only way to communicate is writing custom wrappers. That means communicating directly with COM components.