Adds information about a type library to the system registry.
HRESULT RegisterTypeLib( ITypeLib FAR *ptlib, OLECHAR FAR *szFullPath, OLECHAR FAR *szHelpDir );
The return value obtained from the returned HRESULT is one of the following:
Out of memory.
One or more of the arguments is invalid.
The function could not write to the file.
The system registration database could not be opened.
The type library could not be opened.
The function RegisterTypeLib can be used during application initialization to register the application's type library correctly. When RegisterTypeLib is called to register a type library, both the minor and major version numbers are registered in hexadecimal.
In addition to filling in a complete registry entry under the type library key, RegisterTypeLib adds entries for each of the dispinterfaces and Automation-compatible interfaces, including dual interfaces. This information is required to create instances of these interfaces. Coclasses are not registered (that is, RegisterTypeLib does not write any values to the CLSID key of the coclass).