NtOpenFile - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers

#ifndef _NTIOAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
NtOpenFile(
    _Out_ PHANDLE FileHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ POBJECT_ATTRIBUTES ObjectAttributes,
    _Out_ PIO_STATUS_BLOCK IoStatusBlock,
    _In_ ULONG ShareAccess,
    _In_ ULONG OpenOptions
    );

#endif
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#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwOpenFile(
    _Out_ PHANDLE FileHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ POBJECT_ATTRIBUTES ObjectAttributes,
    _Out_ PIO_STATUS_BLOCK IoStatusBlock,
    _In_ ULONG ShareAccess,
    _In_ ULONG OpenOptions
    );

#endif
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This function is documented in Windows Driver Kit here and here.

(Also available in 2000 DDK.)

FileHandle

Result of call.

DesiredAccess

Access mask to opened file object.

ObjectAttributes

File name, path etc. See NtCreateFile for more information.

IoStatusBlock

Completion status of call.

ShareAccess

Sharing option defined as FILE_SHARE_*.

OpenOptions

Open options.

Documented by

Tomasz Nowak