pub unsafe fn CredUnPackAuthenticationBufferA(
    dwflags: CRED_PACK_FLAGS,
    pauthbuffer: *const c_void,
    cbauthbuffer: u32,
    pszusername: PSTR,
    pcchlmaxusername: *mut u32,
    pszdomainname: PSTR,
    pcchmaxdomainname: Option<*mut u32>,
    pszpassword: PSTR,
    pcchmaxpassword: *mut u32
) -> Result<()>