Printing text file on USB port.

Hi,
I route my output from a VB6 Window Application for Check printing application through a text format. When I try to print this file through the USB port, I am unable to give a direct print. If I save to a file and print the same opening through notepad then i am getting the printout.Earlier i was having this printing application on LPT port. But now printer is in USB port the text is just shown in the printer printing list but it hangs out there. How to directly print a text file through a USB port in high speed draft format from a windows application? Can you kindly provide me the code inorder to print it on usb port,