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One feature that I love is the ability to add a custom tool that is associated with a windows help file. This lets me display context help for the current word containing the cursor. How does Textpad do this? I've been trying to do this via .bat file but have not had any luck. I can't find any documentation on command line args for winhlp32.exe. Does anyone know how I can have a batch file call up a specific help topic by name in a given help file?

You can try KeyHH which provides this ability for most recent help files.

Ironically, the documentation about how to install and run the program is poor, so here are some tips:

1) The stetup program creates "C:\WINDOWS\KeyHH.exe" and "C:\Program Files\KeyWorks\KeyHH.its" (Setup never tells you this )

2) To view the KeyHH documentation, drag the KeyHH.its file to the KeyHH.exe program. (The provided Start Menu shortcut does not work )

You should see examples such as KeyHH -MyID htmlhlp.chm::/api.htm in the help explaining how to use KeyHH.

I found what I was looking for at:

http://www.mvps.org/serenitymacros/winprogs.html

This is what I wanted to do:

winhlp32 -k topicname helpfilename