This module looks for Microsoft HTML Help Compiler
It defines:
HTML_HELP_COMPILER : full path to the Compiler (hhc.exe) HTML_HELP_INCLUDE_PATH : include path to the API (htmlhelp.h) HTML_HELP_LIBRARY : full path to the library (htmlhelp.lib)
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https://cmake.org/cmake/help/v3.19/module/FindHTMLHelp.html