ZwQueryInformationTransactionManager function (wdm.h)

The ZwQueryInformationTransactionManager routine retrieves information about a specified transaction manager object.


NTSYSCALLAPI NTSTATUS ZwQueryInformationTransactionManager(
  [in]            HANDLE                               TransactionManagerHandle,
  [in]            TRANSACTIONMANAGER_INFORMATION_CLASS TransactionManagerInformationClass,
  [out]           PVOID                                TransactionManagerInformation,
  [in]            ULONG                                TransactionManagerInformationLength,
  [out, optional] PULONG                               ReturnLength


[in] TransactionManagerHandle

A handle to a transaction manager object that was obtained by a previous call to ZwCreateTransactionManager or ZwOpenTransactionManager. The handle must have TRANSACTIONMANAGER_QUERY_INFORMATION access to the object.

[in] TransactionManagerInformationClass

A TRANSACTIONMANAGER_INFORMATION_CLASS-typed enumeration value that specifies the information to be obtained. This value must be one of the following:

  • TransactionManagerBasicInformation
  • TransactionManagerLogInformation
  • TransactionManagerLogPathInformation
The enumeration's TransactionManagerOnlineProbeInformation value is not used with ZwQueryInformationTransactionManager.

[out] TransactionManagerInformation

A pointer to a caller-allocated buffer that receives the information that the TransactionManagerInformationClass parameter specifies. The buffer's structure type must be TRANSACTIONMANAGER_BASIC_INFORMATION, TRANSACTIONMANAGER_LOG_INFORMATION, TRANSACTIONMANAGER_LOGPATH_INFORMATION, or TRANSACTIONMANAGER_RECOVERY_INFORMATION.

[in] TransactionManagerInformationLength

The length, in bytes, of the buffer that the TransactionManagerInformation parameter points to, including the length of any additional array elements that the caller has allocated to receive information.

[out, optional] ReturnLength

A pointer to a caller-allocated variable that receives the length, in bytes, of the information that KTM writes to the TransactionManagerInformation buffer. This parameter is optional and can be NULL.

Return value

ZwQueryInformationTransactionManager returns STATUS_SUCCESS if the operation succeeds. Otherwise, this routine might return one of the following values:

Return code Description
The TransactionManagerInformationClass parameter's value is invalid.
The length of the buffer that is specified by the TransactionManagerInformationLength parameter is incorrect.
The specified handle is not a handle to a transaction manager object.
An object handle is invalid.
The caller does not have appropriate access to the transaction manager object.
The buffer that is specified by the TransactionManagerInformation parameter is too small.

The routine might return other NTSTATUS values.


For more information about how to use ZwQueryInformationTransactionManager, see Using Log Streams with KTM.

NtQueryInformationTransactionManager and ZwQueryInformationTransactionManager are two versions of the same Windows Native System Services routine.

For calls from kernel-mode drivers, the NtXxx and ZwXxx versions of a Windows Native System Services routine can behave differently in the way that they handle and interpret input parameters. For more information about the relationship between the NtXxx and ZwXxx versions of a routine, see Using Nt and Zw Versions of the Native System Services Routines.


Requirement Value
Minimum supported client Available in Windows Vista and later operating system versions.
Target Platform Universal
Header wdm.h (include Wdm.h, Ntddk.h, Ntifs.h)
Library NtosKrnl.lib
DLL NtosKrnl.exe
DDI compliance rules HwStorPortProhibitedDDIs(storport), PowerIrpDDis(wdm)

See also





Using Nt and Zw Versions of the Native System Services Routines