GetNtmsObjectAttributeA function (ntmsapi.h)

Article
02/09/2023

[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 GetNtmsObjectAttributeA(
  [in]      HANDLE      hSession,
  [in]      LPNTMS_GUID lpObjectId,
  [in]      DWORD       dwType,
  [in]      LPCSTR      lpAttributeName,
  [out]     LPVOID      lpAttributeData,
  [in, out] LPDWORD     lpAttributeSize
);

Parameters

[in] hSession

Handle to the session returned by the OpenNtmsSession function.

[in] lpObjectId

Unique identifier of the object from which to retrieve the data.

[in] dwType

RSM object type. For a list of object types, see NtmsObjectsTypes.

[in] lpAttributeName

Name of the extended attribute whose data is to be retrieved.

[out] lpAttributeData

Pointer to the buffer that receives the data.

[in, out] lpAttributeSize

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: 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.

Note

The ntmsapi.h header defines GetNtmsObjectAttribute as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	ntmsapi.h
Library	Ntmsapi.lib
DLL	Ntmsapi.dll