Extlibs, or external libraries, are a method to include wrapper libraries in an external object, a dynamic link library or shared object depending on the system. These extlibs are only loaded when the script writer needs them, via the #link directive. In addition, extlibs allow an application to include additional wrapper libraries for its scripts that were not available when the application was released.
ScriptEase releases for each operating system include sample extlibs as well as the source code for all extlibs shipped with that version. The source code is found in subdirectories of the src\lib directory, while the projects or makefiles are found in subdirectories of the extlibs directory.
BUILDING AN EXTLIB