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