You can change the Xsockets tool by adding additional support for the socket network routines, for example, inet_addr().
If you choose to customize this tool to meet your own needs, it is recommended that you do not make changes in the QUSRTOOL library. Instead, copy the source files into a separate library and make the changes there. This preserves the original files in the QUSRTOOL library so they are available if needed in the future. You can use the TSOCRT program to recompile the tool after making your changes (note that if the source files are copied to a separate library, you also need to make changes in TSOCRT to use it). Use the TSODLT program to remove old versions of the tool objects before creating the tool.