This program has unique features which you will not find in the other chm-making programs. First of all it is a advanced engine for key phrases detection. Program can detect key phrases in bold, italic, underlined text, in headers and tables headers, in meta-tag. You can customize this engine at your own discretion. The second helpful feature is ability to add pages from various directories and result CHM-file can be saved anywhere you want. Most of other programs create CHM in the same folder as source files and compiled CHM work incorrectly if the source files will be moved to another place or deleted.