Reading/adressing the value of individual pins of my printerport in Pascal

Can anyone out there tell me how I can read/adress the 'value' of an
individual pin of my printerport in Pascal ?

Thanks in advance,

Wendell.

(please send a copy to my e-mail adress: W.P.J.Kul...@research.kpn.com
 I wouldn't like to miss it !)