We have discussed the advantages to be gained from the use of dynamic
link libraries (DLLs) for the development of knowledge based systems f
or the Microsoft Windows operating system. The implementation aspects
are now described, and we provide general directions, background infor
mation and a number of fragments of useful code for DLL development. A
s an illustration, a DLL for classical statistical distributions is de
veloped by writing a set of interface functions for an available C lib
rary.