libchm-dev - 2:0.40a-5 main

It is a very simple library, but sufficient for dealing with all of the chm
files. Library currently does not has write support.
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CHM files are used on the Microsoft Windows platform to store program
documentation, almost always in the form of HTML, with some non-standard
quirks. CHM files are a form of archive known as InfoTech Storage Format
(ITSF) files and contain some special files to implement features of the
CHM viewer.
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This package includes development headers, libraries and test programs.