\begin{methoddesc}[socket]{connect_ex}{address}
Like \code{connect(\var{address})}, but return an error indicator
-instead of raising an exception. The error indicator is 0 if the
+instead of raising an exception for errors returned by the C-level
+\cfunction{connect()} call (other problems, such as ``host not found,''
+can still raise exceptions). The error indicator is \code{0} if the
operation succeeded, otherwise the value of the \cdata{errno}
variable. This is useful, e.g., for asynchronous connects.
\end{methoddesc}