Function OREnumKey 

pub unsafe fn OREnumKey(
    handle: ORHKEY,
    dwindex: u32,
    lpname: PWSTR,
    lpcname: *mut u32,
    lpclass: Option<PWSTR>,
    lpcclass: Option<*mut u32>,
    lpftlastwritetime: Option<*mut FILETIME>,
) -> WIN32_ERROR