Here are some sources of additional information about customizing FORMS:
There is a variety of sample code in FORMS’ Documentation directory.
FORMS INI File Help (explains how to adjust settings in the initialization files used with FORMS).
Cypress Enable Language Reference, a PDF document that contains VBA programming information. (Nothing happens when I click the link.)
See also documentation from Cypress Software, Microsoft Press or other sources.
All of the above are available in English only.