There are many ways to show a help HTML file through a winform depending on your requirement.Here i tell you some of them-
1. For Showing a single HTML page -
a. You can use a Web Browser control
2. For Showing multiple HTML Pages (Set of HTML Pages more than one)
a. You have to create a HTML Help File (.chm) file, for this you can use HTML Workshop Application. Here you can add multiple HTML pages and create an Microsoft Help File (.chm).
Once you created your Help file Follow the steps.
1.Add the help file to your solution.
2.Try the code on some control event (Click event for button)
->Contact if you need more information on mail-
-> Link to download HTML Workshop -