pub unsafe extern "system" fn NtCopyFileChunk(
    SourceHandle: HANDLE,
    DestinationHandle: HANDLE,
    EventHandle: HANDLE,
    IoStatusBlock: *mut IO_STATUS_BLOCK,
    Length: u32,
    SourceOffset: *mut i64,
    DestOffset: *mut i64,
    SourceKey: *mut GUID,
    DestKey: *mut GUID,
    Flags: u32
) -> NTSTATUS