[Boost-users] asio - How do I modify code using old ASIO to newer version?

Hi , I have some code using the old version of ASIO . some code like this: try { while( mWrapped->mSocket.in_avail() > 0 ) { ... but I found that there is no in_avail() method exist in current version. how can I resolve the problem ? Plz dont just give a web link. I'm using the very very slow internet connection.. so , search from internet or even get the document is difficult.