To view projects in the HTML Help viewer, generate HTML Help and then run your project. This enables you to see your project in much the same way that your users will view it.
From the File menu, select Generate – Microsoft HTML Help. Your HTML Help project opens in the HTML Help viewer. All browse sequences, hyperlinks, expanding hotspots, expanding glossary hotspots, drop-down hotspots, and Dynamic HTML special effects are active so you can test them.