CHM help on network share won't open from application

Question

I have a .NET WinForms application that uses CHM help file. Both executable and CHM are on a network share. I used http://www.helpandmanual.com/products_hhreg.html to create registry entries that could allow display of the help contents. If I open the file itself from the share all is OK. However, when I press F1 in my application to invoke help, I get the familiar "Navigation to the webpage was canceled" error. No matter what I do, including setting zone security level = 2 will help. How do I go about using CHM help in my application when launched from a network share?

Answer 1

System.Diagnostics.Process.Start(path); 

I found this other approach https://stackoverflow.com/a/928156/1757491 which seems to allow me to view the help but when I use

 System.Windows.Forms.Help.ShowHelp(null, path); 

I get what you describe.