One problem with the CHM engine is that it's stuck with an ancient Internet Explorer version for rendering. Image is Everything and you ain't got it! The biggest alternative these days is no system based help at all, but links to online documentation.įor Windows apps though it's still very common to see CHM help files and there are still a ton of CHM help out there and lots of tools (including our own West Wind Html Help Builder) that produce output for CHM files as well as Web output. While there have been various attempts to replace CHM help files CHM files still seem to be a popular choice for many applications to display their help systems. Because of its use of the Internet Explorer shell for rendering there were many security issues in the past, which resulted in locking down of the Web Browser control in Windows and also the Help Engine which caused some unfortunate side effects.Įven so, CHM continues to be a popular help format because it is very easy to produce content for it, using plain HTML and because it works with many Windows application platforms out of the box. Html Help 1.0 is basically a completely HTML based Help system that uses a Help Viewer that internally uses Internet Explorer to render the HTML Help content. In fact, it's practically ancient as it was introduced in 1997 when Internet Explorer 4 was introduced.
The HTML Help 1.0 specification aka CHM files, is pretty old.
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