Function OpenStreamOnFileW 

pub unsafe fn OpenStreamOnFileW<P3, P4>(
    lpallocatebuffer: Option<unsafe extern "system" fn(u32, *mut *mut c_void) -> i32>,
    lpfreebuffer: Option<unsafe extern "system" fn(*mut c_void) -> u32>,
    ulflags: u32,
    lpszfilename: P3,
    lpszprefix: P4,
) -> Result<IStream, Error>
where
    P3: Param<PCWSTR>,
    P4: Param<PCWSTR>,