Function SHMessageBoxCheckA 

pub unsafe fn SHMessageBoxCheckA<P1, P2, P5>(
    hwnd: Option<HWND>,
    psztext: P1,
    pszcaption: P2,
    utype: u32,
    idefault: i32,
    pszregval: P5,
) -> i32
where
    P1: Param<PCSTR>,
    P2: Param<PCSTR>,
    P5: Param<PCSTR>,