receipt program needs Fixxed

I have a simple reciept program that i had a few changes made to awhile back. When the previous coder made those changes the receipt printing became messed up. It with print correctally on a letter sized peice of paper. But i need it to print on a 70mm X 200mm size receipt paper from a STAR TSP 100 printer. Another thing that went wrong was when typing in a clients name it would work in a way that would auto fill in first name to last. For example: if you typed J all the first names with J would pop up then you would add a e then the first names with Je would pop up and on down the line. If there were two people lets say with the name Jesse you could type the first letter of their last name for example Jesse S and then a Jesse Smith would auto fill in and you could pick that name. Iit was coded with Visual Studio/Visual Basic. j