IStorage::CreateStorage
Creates and
opens a new storage object nested within this storage object.
HRESULT CreateStorage(
|
const WCHAR * 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 a wide character string that contains the name of the newly created storage
object. This name can be used later to 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] When
successful, points to the location of the IStorage pointer to the newly-created
storage object. This parameter is set to NULL if an error occurs.
Return Values
S_OK
The storage
object was created successfully.
E_PENDING
Asynchronous
Storage only: Part or all of the necessary data is currently unavailable. For
more information see IFillLockBytes and Asynchronous Storage.
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 storage
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.
Remarks
If a storage
with the name specified in the pwcsName parameter already exists within
the parent storage object, and the grfMode parameter includes the
STGM_CREATE flag, the existing storage is replaced by the new one. 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 a storage
object with the same name already exists and grfMode is set to
STGM_FAILIFTHERE, this method fails with the return value
STG_E_FILEALREADYEXISTS.
See Also