|
IStorage::CreateStorage
Creates and opens a new storage object nested within this storage object.
HRESULT CreateStorage(
const wchar_t * pwcsName,
| //Points to the name of the new storage object
| DWORD grfMode,
| //Access mode for the new storage object
| DWORD reserved1,
| //Reserved; must be zero
| DWORD reserved2,
| //Reserved; must be zero
| IStorage ** ppstg
| //Points to new storage object
| );
|
|
Parameters
pwcsName
[in]Points to the name of the newly created storage object. This name can be
used later to open or reopen the storage object.
grfMode
[in]Specifies the access mode to use when opening the newly created storage
object. See the STGM enumeration values for descriptions of the possible values.
reserved1
[in]Reserved for future use; must be zero.
reserved2
[in]Reserved for future use; must be zero.
ppstg
[out]Points to the location where the new IStorage interface pointer is returned; only valid if the operation is successful.
This parameter is set to NULL if an error occurs.
Return Values
S_OK
The storage object was created successfully.
STG_E_ACCESSDENIED
Insufficient permissions to create storage object.
STG_E_FILEALREADYEXISTS
The name specified for the storage object already exists in the storage object
and the grfmode flag includes the flag STGM_FAILIFTHERE.
STG_E_INSUFFICIENTMEMORY
The storage object was not created due to a lack of memory.
STG_E_INVALIDFLAG
The value specified for the grfMode flag is not a valid STGM enumeration value.
STG_E_INVALIDFUNCTION
The specified combination of grfMode flags is not supported.
STG_E_INVALIDNAME
Invalid value for pwcsName.
STG_E_INVALIDPOINTER
The pointer specified for the storage object was invalid.
STG_E_INVALIDPARAMETER
One of the parameters was invalid.
STG_E_REVERTED
The object has been invalidated by a revert operation above it in the
transaction tree.
STG_E_TOOMANYOPENFILES
The storage object was not created because there are too many open files.
STG_S_CONVERTED
The existing stream with the specified name was replaced with a new storage
object containing a single stream called CONTENTS. The new storage object will be
added.
Comments
If an element with the name specified in the pwcsName parameter already exists and the grfMode parameter includes the STGM_CREATE flag, the existing element is replaced by
the new storage object. If the grfMode parameter includes the STGM_CONVERT flag, the existing element is converted
to a stream object named CONTENTS and the new storage object is created
containing the CONTENTS stream object. The destruction of the old element and the
creation of the new storage object are both subject to the transaction mode on the
parent storage object.
If the storage object already exists and grfMode is set to STGM_FAILIFTHERE, this method fails with the return value
STG_E-FILEALREADYEXISTS.
Note to Callers
The OLE-provided compound file implementation of the IStorage::CreateStorage method does not support the STGM_DELETEONRELEASE flag. Other implementations
of IStorage might support this flag.
See Also
IStorage::OpenStorage
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