Tools for Interoperability between the.NET Framework and COM

1. For calling COM APIs from managed code, use Type Library Importer (Tlbimp.exe) which takes a type library as input and outputs a .NET Framework assembly and associated managed metadata.
2. For calling managed code from COM, use Type Library Exporter (Tlbexp.exe), which takes a managed assembly as input, and generates a type library containing COM definitions of all the public types defined in that assembly.
3. For calling managed components from COM clients, use Assembly Registration Tool (Regasm.exe), which reads the metadata within a .NET Framework assembly, and adds the registry entries so that COM clients can create managed classes.
4. For calling ActiveX controls, use Windows Forms ActiveX Control Importer (Aximp.exe), which takes an ActiveX control’s type library as input and generates a wrapper control that allows the control to be hosted in Windows Forms.