*hits head of desk*
a dll is a dynamic link library, you can make them in c++, delphi etc.
what do they do - in dbpro terms they add more functions to the language, in c++ terms it is a way of releasing code that other people can use with out giving away the source-code or leaving tthem to compile it
if you want to write a dbpro dll (called a tpc[third party command]) then look in the help system under technical documents and third part commands
Used to be Phoenix_insane registered in september 2003 despite what the date says to the left <--
PC - amd athlon 2.0ghz, 512mb, GeForce FX 5200 128mb, 200gb, xp pro sp2