Delete Lines Without Utility

A command line utility to go through a text file and delete and lines that do not contain the criteria you enter. This is designed so you can use it as a tool in a text editor or called from a batch file. You could use it to scrub a generated report for instance. Maybe all you need are lines that contain $ in them, well you could use this to remove all the lines that do not have a $ in them. I have seen this as a problem on more than one forum so I wrote this utility to fix it.