Code of Rollback Pages using DMP

Hi All, I want to code for rollback paper (no of lines that I give) that already ejected from Dot Matrix Printer (DMP) due to printing of bills or anything. That particular code I will run in my existing software (written in Visual Foxpro 6.0) and solve my problem. For that You have to developed such code / .dll file that run in my exiting code of software, for helping purpose I also attached my exiting code for printing in that software (written in Visual Foxpro 6.0). This is treat as very much urgent and I know for efficient programmer this work to be solving within 3 hrs.