You can configure the LispWorks IDE and your application to use resources on GTK+ and Motif. The applicable resources determine the default fonts, colors and certain other properties used in CAPI elements.
is used to match resources. CAPI gives a name for the main widget that it creates for each element that has a representation in the library. This name is then included in the "path" that GTK+ and Motif use to match resources for each widget.
CAPI User Guide (Unix version) - 30 Aug 2011