Open Helpfile from Excel VBA or hyperlink
 

I made a helpfile for an Excel application, using the ShalomHelpMaker
program and the HelpWorkshop WinHelp 4.0 compiler, and stored it in
the same directory as the Excel Workbook.

When trying to call the helpfile from within Excel using a hyperlink
or VBA macro, a message pops up, warning me for possible viruses, and
asking me if this file is from a trustworthy source.

In the helpfile's properties, I entered a source name and author name.
In Excel, I added the same source name to the list of trusted sources.
I also digitally signed the project containing the macro calling the
helpfile.
This does not help.

Is there a way to call an external file withour getting this message?

Kind regards,
Thijs Hessels.