#ifndef _NTTMAPI_H

/**
 * Updates KTM transaction properties. Use TransactionPropertiesInformation to change its
 * description/deadline; do not use the Outcome field to commit/abort.
 *
 * \param TransactionHandle KTM handle with TRANSACTION_SET_INFORMATION (0x2).
 * \param TransactionInformationClass Public property infoclass 1. The native implementation additionally
 * accepts private/deprecated bind (4) and DTC opaque data (5), not basic (0), enlistments (2) or superior
 * (3).
 * \param TransactionInformation Readable caller-owned input copied before normal handle access validation.
 * Native properties/bind input requires 4-byte alignment; the WoW64 properties helper copies to aligned
 * temporary storage and accepts unaligned source input. Prefer natural alignment and do not rely on copyback.
 * \param TransactionInformationLength Properties needs at least 32 bytes and enough space for
 * DescriptionLength bytes beginning at offset 24. Description may be at most 128 bytes. Bind needs exactly 8
 * native bytes (one manager handle); WoW64 accepts at least 4 source bytes and widens the handle. Private DTC
 * data accepts 1 through 1024 native bytes; these private operations are not general application interfaces.
 * \return STATUS_SUCCESS or failure. Properties shorter than 32 returns STATUS_INFO_LENGTH_MISMATCH. A
 * declared description beyond the supplied input returns STATUS_INVALID_PARAMETER natively but
 * STATUS_INFO_LENGTH_MISMATCH from the WoW64 precheck; description length above 128 is rejected by native
 * code.
 * \remarks Properties is not a wholesale replacement of every field. Outcome is ignored by the setter.
 * DescriptionLength = 0 clears description, but Timeout = 0 preserves an existing timeout rather than
 * disabling it. Nonzero isolation fields overwrite existing fields on the internal path; public callers
 * should keep reserved isolation fields 0. The helper can update the description before a later timer
 * operation fails, so do not assume universal all-or-nothing mutation on failure. Use the explicit outcome
 * APIs.
 * \sa https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/nf-wdm-zwsetinformationtransaction
 */
_Kernel_entry_
NTSYSCALLAPI
NTSTATUS
NTAPI
NtSetInformationTransaction(
    _In_ HANDLE TransactionHandle,
    _In_ TRANSACTION_INFORMATION_CLASS TransactionInformationClass,
    _In_reads_bytes_(TransactionInformationLength) PVOID TransactionInformation,
    _In_ ULONG TransactionInformationLength
    );

#endif
View code on GitHub

#ifndef _NTZWAPI_H

_Kernel_entry_
NTSYSCALLAPI
NTSTATUS
NTAPI
ZwSetInformationTransaction(
    _In_ HANDLE TransactionHandle,
    _In_ TRANSACTION_INFORMATION_CLASS TransactionInformationClass,
    _In_reads_bytes_(TransactionInformationLength) PVOID TransactionInformation,
    _In_ ULONG TransactionInformationLength
    );

#endif
View code on GitHub

// wdm.h

__kernel_entry NTSYSCALLAPI NTSTATUS NtSetInformationTransaction(
  [in] HANDLE                        TransactionHandle,
  [in] TRANSACTION_INFORMATION_CLASS TransactionInformationClass,
  [in] PVOID                         TransactionInformation,
  [in] ULONG                         TransactionInformationLength
);
View the official Windows Driver Kit DDI reference

// wdm.h

NTSYSCALLAPI NTSTATUS ZwSetInformationTransaction(
  [in] HANDLE                        TransactionHandle,
  [in] TRANSACTION_INFORMATION_CLASS TransactionInformationClass,
  [in] PVOID                         TransactionInformation,
  [in] ULONG                         TransactionInformationLength
);
View the official Windows Driver Kit DDI reference