Receipt print in Custom POS Button

Hi ,

How should I go about printing a receipt using vb.net code, from my Custom POS button ? 

Currently I'm using the Printnormal method and some ESC commands , but it only works for a specific printer.In other printers there are alignment issues.

Is there any method I can use to print receipt from my code irrespective of the printer attached to the POS and also from any drivers (Windows or OPOS) ?

Please help.

thanks

Ansuman