With PV‑WAVE version 6.0 and later versions, it is possible to write PV‑WAVE GUI applications that are portable between Motif-based and Microsoft Windows-based systems. Some consideration needs to be given to the design of such applications to ensure they are indeed portable between the two systems. While the vast majority of the commands that comprise the PV-WAVE language will run on all platforms, special consideration to the Wave Widgets commands in particular is required.