Viewing Type Library Information
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
In the Object Browser, choose OpenType Library.
In the Open dialog box select the tab that will give you access to the library you want.
Recent History tab lists the most recently opened libraries.
COM libraries tab lists the available libraries and provide a Browse button so you can find the library you want.
Current Selection lists any open libraries.
In the Files of type drop-down list in the Open dialog box, choose Application, *.dll, *.ocx, *.olb, or *.tlb.
Select a library and click OK.
The type library information for the selected file is displayed in the Classes & Members list.