Hi, I try to use boost::lambda in the following function: string build_headers(shared_ptr<connection> conn, vector<wstring> headers) { if (headers.empty()) return ""; return accumulate(++headers.begin(), headers.end(), string(1, '\'') + conn->quote(headers[0]) + '\'', (_1 + ", '" + bind(&connection::quote, var(conn), _2) + '\'')); } and wisual studio gives me the following error message error C2664: 'boost::lambda::bind' : cannot convert parameter 1 from 'overloaded-function' to 'SOCKET' 1> Context does not allow for disambiguation of overloaded function Could anybody help me decypher this message? What is this 'SOCKET' and how does it come into the picture? Thanks ImRe