Описание тега tlbimp
The Type Library Importer is a Microsoft tool that converts the type definitions found within a COM type library into equivalent definitions in a common language runtime assembly.
The output of the Type Library Importer (tlbimp.exe) is a binary file (an assembly) that contains runtime metadata for the types defined within the original type library.
COM type definitions usually reside in a type library. In contrast, CLS-compliant compilers produce type metadata in an assembly. The two sources of type information are quite different. The Type Library Importer is used for generating metadata from a type library. The resulting assembly is called an interop assembly, and the type information it contains enables.NET Framework applications to use COM types.
More information is availabe on MSDN, including a guide on how to use it.