HTML Help processing

The htmlhelp transformation creates HTML Help control files. If the build runs on a system that has the HTML Help compiler installed, the control files are compiled into a CHM file.

Once the pre-processing and XHTML processes are completed, most of the HTML Help processing is handled by the following targets:
Create the HHP, HHC, and HHK files. The HHK file is sorted based on the language of the map.
Ensures that the content can be processed correctly by the compiler, and that the appropriate code pages and languages are used.
Attempts to detect the HTML Help compiler. If the compiler is found, the full project is compiled into a single CHM file.