ReadClassStg function (coml2api.h)

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

Syntax

HRESULT ReadClassStg(
  [in]  LPSTORAGE pStg,
  [out] CLSID     *pclsid
);

Parameters

[in] pStg

Pointer to the IStorage interface on the storage object containing the CLSID to be retrieved.

[out] pclsid

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:

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

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps | UWP apps]
Minimum supported server	Windows 2000 Server [desktop apps | UWP apps]
Target Platform	Windows
Header	coml2api.h (include Ole2.h)
Library	Ole32.lib
DLL	Ole32.dll

See also

IStorage::Stat

OleLoad

STATSTG

WriteClassStg