dGE comes with a run-time licence, so you can give away your creations completely
free of any royalty payments. Interpreted program (raw ASCII .PRG files) such as those
running directly under dBASE III/III+ (from the aow ancient dot prompt mode)
execute the various dGE function through the use of a screen escape codes,
and a small Terminate and Stay Resident program (TSR). Your program
communicates with the TSR program directly, and this enables various graphical functions to be invoked.