I want to build an user interface once and deploy it to Unix/Linux and Windows. How should I do this with the BX product family?

ICS offers BX/WIN SDK as the preferred solution to a Windows deployment. BX/WIN SDK includes a complete UNIX development environment that runs on Windows. It also includes copies of Motif and ported versions of ICS’ ViewKit and EnhancementPak libraries. BX/WIN SDK provides a proven solution for the migration of large applications to Windows.