Function CryptAcquireContextA 

pub unsafe fn CryptAcquireContextA<P1, P2>(
    phprov: *mut usize,
    szcontainer: P1,
    szprovider: P2,
    dwprovtype: u32,
    dwflags: u32,
) -> Result<()>
where
    P1: Param<PCSTR>,
    P2: Param<PCSTR>,