Function nt_open_file 

pub fn nt_open_file(
    file_handle: *mut HANDLE,
    desired_access: u32,
    object_attributes: *mut OBJECT_ATTRIBUTES,
    io: *mut IO_STATUS_BLOCK,
    share_access: u32,
    options: u32,
) -> i32

Dynamically calls NtOpenFile.

It will return the NTSTATUS value returned by the call.