fhopen - use already open filehandle for I/O 

    $ok = $obj->fhopen($fh);


This method associates the open filehandle $fh with $obj for further I/O. Filehandle $fh must already be opened. 
Suppose you want to use the features of this module to do I/O to something other than a TCP port, for example STDIN or a filehandle opened to read from a process. Instead of opening the object for I/O to a TCP port by using open() or new(), call this method instead.