Function SHPathPrepareForWriteW 

pub unsafe fn SHPathPrepareForWriteW<P1, P2>(
    hwnd: Option<HWND>,
    punkenablemodless: P1,
    pszpath: P2,
    dwflags: u32,
) -> Result<()>
where
    P1: Param<IUnknown>,
    P2: Param<PCWSTR>,