GetNtmsObjectAttribute Function

Artículo
06/09/2011

[Removable Storage Manager is no longer available as of Windows 7 and Windows Server 2008 R2.]

The GetNtmsObjectAttribute function retrieves the extended attribute (named private data) from the specified RSM object.

Syntax

DWORD GetNtmsObjectAttribute(
  __in     HANDLE hSession,
  __in     LPNTMS_GUID lpObjectId,
  __in     DWORD dwType,
  __in     LPCTSTR lpAttributeName,
  __out    LPVOID lpAttributeData,
  __inout  LPDWORD lpAttributeSize
);

Parameters

hSession [in]
Handle to the session returned by the OpenNtmsSession function.
lpObjectId [in]
Unique identifier of the object from which to retrieve the data.
dwType [in]
RSM object type. For a list of object types, see NtmsObjectsTypes.
lpAttributeName [in]
Name of the extended attribute whose data is to be retrieved.
lpAttributeData [out]
Pointer to the buffer that receives the data.
lpAttributeSize [in, out]
Size of the data buffer on input, in bytes. On output, the actual size of the data, in bytes.

Return Value

This function returns one of the following values.

Value	Meaning
ERROR_ACCESS_DENIED	NTMS_USE_ACCESS to the object or its container is denied. Other security errors are also possible, but they would indicate a security subsystem error. Windows XP/2000: No access rights are required.
ERROR_DATABASE_FAILURE	The database query or update failed.
ERROR_INSUFFICIENT_BUFFER	The buffer size is not correctly specified. The correct size is returned in the lpAttributeSize parameter.
ERROR_INVALID_HANDLE	The value specified in the hSession parameter is NULL or is not valid.
ERROR_INVALID_PARAMETER	The pointer is NULL or is not valid.
ERROR_NOT_CONNECTED	Unable to connect to the RSM service.
ERROR_OBJECT_NOT_FOUND	The specified attribute was not found.
ERROR_SUCCESS	The function was successful.

Remarks

The GetNtmsObjectAttribute function must be executed on the RSM server. Because the buffer of bytes is unmarshaled between systems of different architectures, remote execution of this function may result in unpredictable results.

The following is the list of objects that require special access rights.

Object	Access
NTMS_CHANGER	Requires NTMS_USE_ACCESS to the library.
NTMS_CHANGER_TYPE	Requires NTMS_USE_ACCESS to the computer.
NTMS_COMPUTER	Requires NTMS_USE_ACCESS to the computer.
NTMS_DRIVE	Requires NTMS_USE_ACCESS to the library.
NTMS_DRIVE_TYPE	Requires NTMS_USE_ACCESS to the computer.
NTMS_IEDOOR	Requires NTMS_USE_ACCESS to the library.
NTMS_IEPORT	Requires NTMS_USE_ACCESS to the library.
NTMS_LIBRARY	Requires NTMS_USE_ACCESS to the library.
NTMS_LIBREQUEST	Requires NTMS_USE_ACCESS to the library.
NTMS_LOGICAL_MEDIA	Requires NTMS_USE_ACCESS to the media pool of the logical media.
NTMS_MEDIA_POOL	Requires NTMS_USE_ACCESS to the media pool.
NTMS_MEDIA_TYPE	Requires NTMS_USE_ACCESS to the computer.
NTMS_OPREQUEST	Requires NTMS_USE_ACCESS to the computer.
NTMS_PARTITION	Requires NTMS_USE_ACCESS to the media pool of the side.
NTMS_PHYSICAL_MEDIA	Requires NTMS_USE_ACCESS to the media pool.
NTMS_STORAGESLOT	Requires NTMS_USE_ACCESS to the library.

Requirements

Minimum supported client	Windows 2000 Professional
Minimum supported server	Windows 2000 Server
End of client support	Windows Vista
End of server support	Windows Server 2008
Header	Ntmsapi.h
Library	Ntmsapi.lib
DLL	Ntmsapi.dll
Unicode and ANSI names	GetNtmsObjectAttributeW (Unicode) and GetNtmsObjectAttributeA (ANSI)

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