VWS/UIS is now a third-party package, supported by Touch Technologies.
VWS/UIS date back to what were then known as VAX/VMS releases, and particularly to releases prior to V5.1; prior to 1989. This was obviously prior to the web, and prior to such constructs as PDF and HTML, and softcopy documentation of such comparatively old software is generally not or not widely available.
Look particularly for the document entitled
A Guide to Migrating VWS Applications to DECwindows; this material was shipped within the VWS V4.3 kits among other VWS releases, as was the UISX (also variously known as VAXuisx) API and documentation, the UIS Source Code Annotator tool, and a UIS to DDIF converter tool.
Without some idea of the particular code involved, no specific answer is possible of course, as the effort involved in converting from an unknown VWS/UIS application to an X Windows or (likely better), to a CGI-based application could range from the trivial to the intractable.
As mentioned earlier, there is available UISX support which may be of some interest; this allows various UIS-based applications to operate under X Windows. UISX has the potential to allow you to continue using the UIS APIs.
That written, the OpenVMS Wizard would tend to skip forward to more current interfaces, using CGI or other web APIs when feasible. While X Windows is certainly not going away, most new interfaces are now web-based.
Related topics include (
3183), (
4177), and (
5316).