Type libraries are COM Component definition files that include information about types and objects exposed by an OLE application. A type library can be a stand-alone binary file (.tlb), compiled in an application file (.exe), embedded in an ActiveX control (.ocx), or included in a .dll. Dlls with one or more type libraries are often compiled as object libraries (.olb).
To view type library information
The type library information for the selected file is displayed in the Members list.