Add a plug-in

1. In Page view, at the bottom of the document window, click Design .
2. On the Insert menu, click Web Component.
3. In the Component type list, click Advanced Controls.
4. In the Choose a control list, double-click Plug-In.
5. In the Data source box, type the URL of the file for the plug-in to load, or click Browse to locate the file.
6. Select any other options you want.

Important  Security vulnerabilities in external files or controls may extend to Web pages that use those items. For example, external style sheets (files with a .css extension), script files (files with a .js extension), custom ASP.NET controls, or other items, may pose a security risk. Be sure your style sheets, add-ins, themes, executables, scripts, controls, or other files come from trusted sources.