+\twocolitem{wxUSE\_GUI}{this particular feature test macro is defined to $1$
+when compiling or using the library with the GUI features activated, if it is
+defined as $0$, only wxBase is available.}
+\twocolitem{wxUSE\_BASE}{only used by wxWindows internally (defined as $1$ when
+building wxBase code, either as a standalone library or as part of the
+monolithic wxWindows library, defined as $0$ when building GUI library only)}