弱弱的问!

Question

int WSAEnumProtocols (
  LPINT lpiProtocols,                   
  LPWSAPROTOCOL_INFO lpProtocolBuffer,  
  ILPDWORD lpdwBufferLength             
);这个函数谁能给几行具体点的代码?WSAPROTOCOL_INFO * a=NULL;
LPDWORD length=NULL;
int b=WSAEnumProtocols(NULL,a,length);
cout<<length<<endl;
b=WSAEnumProtocols(NULL,a,length);
cout<<b<<endl;
我测试它的时候length总是没有任何改变。
另外第三个参数msdn里查不到,谢谢!!

Answer 1

楼主试试这样
DWORD length;
int b=WSAEnumProtocols(NULL,a,&length);