It is a good point, and I have downloaded the pdf files for Common Controls and others. The PDF is a good format, well supported, but like the other methods it is not truly an off-line resource. There are many links in the PDF(s) that point back to the Micro$oft web site to get more information. Example: if one clicks 'CreateWindowA macro' link in the PDF the link opens the Micro$oft web
https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-createwindowa rather than include that information in the PDF. I suspect there are as many links in the MS PDF docs as I found were needed in the Controls.chm I created from the GitHub release.
So the idea/hope with the GitHub documentation release was that a truly complete off-line document could be produced. Alas not going to be, at least with the current released docs.
John Z