CHM是一个用于在线帮助的HTML帮助文件。这是微软的专有格式。在CHM文件中，许多HTML帮助文件被压缩、编译和索引。CHM文件主要用作软件手册。LZX压缩技术用于压缩CHM格式的文件。此文件中有一个搜索选项。此外，可以将多个CHM文件添加到一起。
CHM is an HTML help file for online helps. It is proprietary format from Microsoft. In CHM file a number of HTML help files are compressed, compiled and indexed. CHM files are used mostly as software manual. LZX compression technique is used to compress files in CHM format. There is a search option in this file. Moreover multiple CHM files can be added together.
