ReadClassStg function

The ReadClassStg function reads the CLSID previously written to a storage object with the WriteClassStg function.

Syntax

C++


WINOLEAPI ReadClassStg(
  _In_  IStorage *pStg,
  _Out_ CLSID    *pclsid
);

Parameters

pStg [in]: Pointer to the IStorage interface on the storage object containing the CLSID to be retrieved.
pclsid [out]: Pointer to where the CLSID is written. May return CLSID_NULL.

Return value

This function supports the standard return value E_OUTOFMEMORY, in addition to the following:

S_OK: The CLSID was returned successfully.

This function also returns any of the error values returned by the IStorage::Stat method.

Remarks

ReadClassStg is a helper function that calls the IStorage::Stat method and retrieves the CLSID previously written to the storage object with a call to WriteClassStg from the STATSTG structure.

Requirements

Minimum supported client	Windows 2000 Professional [desktop apps \| Windows Store apps]
Minimum supported server	Windows 2000 Server [desktop apps \| Windows Store apps]
Header	Ole2.h
Library	Ole32.lib
DLL	Ole32.dll