In RoboHelp HTML you are able to click File > New > Project and click the Import tab on the dialog.
Note that one of the options is to import a WinHelp .HLP file type.
Helpful and Handy Links
Thanks Rick! One more question please.
I've been trying to download the free trial without any success. I get to the page where you click on "English|Windows|427.9 MB Download" only to get the "Internet Explorer cannot display the webpage" error. Firebox complains about an expired security certificate. Chrome complains about an infinite loop. Am I doing anything wrong?