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KennyT · Joined: 02 Aug 2005 Posts: 318

I've got a compiled help (.chm) file that I'd like to access various pages from to provide context sensitive help. I think the winAPI function I'd like to call is "HtmlHelp" (see http://msdn.microsoft.com/en-us/library/ms670172.aspx)

So, I've tried various declaration statements:

C_EXTERNAL HTMLHELP '__HtmlHelp' (VAL, STRING, VAL, VAL) : INTEGER*4
C_EXTERNAL HTMLHELP '_HtmlHelp' (VAL, STRING, VAL, VAL) : INTEGER*4
C_EXTERNAL HTMLHELP 'HtmlHelp' (VAL, STRING, VAL, VAL) : INTEGER*4
C_EXTERNAL HTMLHELP '__htmlhelp' (VAL, STRING, VAL, VAL) : INTEGER*4
C_EXTERNAL HTMLHELP '_htmlhelp' (VAL, STRING, VAL, VAL) : INTEGER*4
C_EXTERNAL HTMLHELP 'htmlhelp' (VAL, STRING, VAL, VAL) : INTEGER*4

But whatever I tried, it comes up as an undefined external at link time.

What have I missed!?

TIA

K

edit: I've also tried (taken from another forum question):

STDCALL HTMLHELP 'HtmlHelpA' (VAL,STRING,VAL,VAL):INTEGER*4
LIBRARY "c:\windows\system32\hhctrl.ocx"

but it didn't help.

K

OK, sussed it! The OCX file needs to be included in the link script!

K

LitusSaxonicum · Posted: Wed Jan 25, 2012 9:10 pm Post subject:

Looks wrong to me. You can run CHM files using HH.EXE. Here's my routine for doing so. It is a callback to the Help menu item:

PaulLaidler · Posted: Thu Jan 26, 2012 9:44 am Post subject:

Both approaches are viable. The first may give more control over direct access to particular topics etc.

KennyT · Joined: 02 Aug 2005 Posts: 318

True. Using HtmlHelp, I can kick off the compiled help file at a particular topic, on a particular page. But I think the same is true of "HH":

"HH helpfile.chm::/document.htm#title"

seems to work as well.

There are other options with HtmlHelp, though, for example to start the help file at the index tab. Not sure how to do that with "HH".

K

KennyT · Joined: 02 Aug 2005 Posts: 318

one problem i have with using the HtmlHelp method is that printing fails. The call i'm making is:

LitusSaxonicum · Posted: Thu Oct 04, 2012 3:57 pm Post subject:

Kenny,

Doesn't HH start at the index tab if you don't give it instructions to start elsewhere?

My HH (Win 7 32) has a Home toolbar button to get to the start, the tree can be shown or removed, and there is a print button.

Eddie

PaulLaidler · Posted: Thu Oct 04, 2012 4:37 pm Post subject:

If HtmlHelp requires a NULL value for an argument then you should pass CORE4(0).

KennyT · Joined: 02 Aug 2005 Posts: 318

I tried passing core4(0) and it didn;t help.

The print button is there, but it just comes up with a popup ("An error occurred with this operation"). The printer selection dialogue briefly flashes first.

I should say that the printing function works OK if I use "HH" or just double click the CHM file.

K