First of all - you must read the programmers manual, learn commands set.
Simple "play" with PowerAnt switches you can using standard console program like HyperTerminal (HyperTerminal setup are described in programmers manual).
Write programs for PowerAnt on Perl is simple .
C/C++ programming, some sample programs.
Programming PowerAnt in MS Access. Just setup standard ActiveX component and go.
The super computation power of MS Excel may be used for PowerAnt control!
Programmer manual and user manual you can find in the documentation page.