IStorage::SetClass method (objidl.h)

The SetClass method assigns the specified class identifier (CLSID) to this storage object.

Syntax

HRESULT SetClass(
  [in] REFCLSID clsid
);

[in] clsid

The CLSID that is to be associated with the storage object.

This method can return one of these values.

Return code	Description
S_OK	The CLSID was successfully assigned.
E_PENDING	Asynchronous Storage only: Part or all of the storage's data is currently unavailable.
STG_E_ACCESSDENIED	The caller does not have enough permissions for assigning a CLSID to the storage object.
STG_E_MEDIUMFULL	Not enough space was left on device to complete the operation.
STG_E_REVERTED	The storage object has been invalidated by a revert operation above it in the transaction tree.

When first created, a storage object has an associated CLSID of CLSID_NULL. Call SetClass to assign a CLSID to the storage object.

Call the IStorage::Stat method to retrieve the current CLSID of a storage object.

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	objidl.h
Library	Uuid.lib
DLL	Ole32.dll