HelpNDoc can import existing CHM help files. There are two ways to exploit those files:
- To only import the table of contents, create a new project and in the new project wizard dialog, click the "import from existing project" link to import the table of contents of a specific CHM file;
- To import the whole content of the CHM file, use the "File" menu, click the "Import" button and choose the file to import. This will create a new project with all the contents that could be imported from that CHM file.