Sushil,

Carefully read the Programming Algorithm in the datasheet. AT89C51 provides a READY/BUSY signal on P3.4 during programming. You can use it, and you wouldn't require softwrae delays.

VB does not allow you to directly "peek" or "poke" the Parallel Port. Howevere you can access the serail port using mscomm function.


Regards

IA