Function MessageBoxExA

pub unsafe fn MessageBoxExA<P1, P2>(
    hwnd: Option<HWND>,
    lptext: P1,
    lpcaption: P2,
    utype: MESSAGEBOX_STYLE,
    wlanguageid: u16,
) -> MESSAGEBOX_RESULT
where
    P1: Param<PCSTR>,
    P2: Param<PCSTR>,