US Patent 7423769 Graphical user interface

A printer filter including a companion script file and which filters a standard printer data stream to perform a user-specified print job. In particular, the filter is a computer program which may access other programs or data files, and which reads a standard printer data stream, transforms the input in accordance with instructions contained within the computer program, and then outputs the filtered or transformed information to the printer. The present invention also provides a graphical user interface to assist a user in operating the computer program. In particular, the graphical user interface includes a parent window having a display control which list a possible filters to be selected, along with a plurality of other display controls to assist the user in operating the computer program product.