V-Grep is an easy-to-use and feature-rich application that brings regular expressions' power to the typical Windows users. Even in DOS you could use masks to speed-up searching for files. These masks were later adopted for use in Windows. Masks are special types of strings that with the help of reserved characters that allow you to easily describe complex patterns. You can specify expressions representing complex patterns that are difficult or impossible to find using only masks, such as: e-mail addresses, telephone numbers, IP addresses etc. In the Unix-class systems regular expressions are handled by a program called GREP (Global Regular Expression Print). V-Grep (Visual GREP) gives you whole functionality of GREP and lots of other very useful options - all packed in a typical Windows GUI.