The most popular method of creating or editing visual styles was through TGTSoft’s StyleBuilder application. This program provided a user friendly interface to import, edit, or create new visual styles to suit your needs. Image editors can be assigned to edit or replace bitmaps or png files that are contained within a theme’s *.msstyle file. Later versions of the application have added functionality to allow editing of the shellstyle.dll file which skins the popular tasks sections seen on the left side of explorer windows, as well as some control panel applets.