public override bool Request(out string msg)
{
bool res = true;
int st = 0;
ushort cardtype;
st = ReaderDllMethod.mwRequest(handle, Mode, out cardtype); //请求卡TYPE A 类型卡片
if (st < 0)
{
msg = st.ToString() + "*" + ReaderDllMethod.getErrMsg(st);
res = false;
}
else
{
msg = st.ToString() + "*" + ReaderDllMethod.getErrMsg(st);
CardType = cardtype;
DevBeep(1, 1, 2);
}
return(res);
}