Win.Help – calling a help file

To invoke a standard help file at its contents page:

Win.Help'C:\APL\CAUSEWAY\Cpro.hlp'

You may also pass a context number as the left argument:

8020 Win.Help'C:\APL\CAUSEWAY\Cpro.hlp'

This will enter the help file directly at the page with this number. In the example, it will show the help for the CPro.Accel function. If you have built your help file with the 32-bit style ‘tree of books’ interface, it will have a matching *.CNT file associated with it. Pass ¯1 as the context number to open the file here.

Finally, you can pass a keyword, which will either go directly to the page (if the keyword is unique) or put up the built-in search dialogue to offer the user a choice of possible topics:

'Accelerators' Win.Help'C:\APL\CAUSEWAY\Cpro.hlp'

Here you can see the three topics which were marked with the given keyword.