About adding and removing advanced controls from FrontPage

Whenever you download, register, or install an advanced control on your computer, it is automatically added to the list of available advanced controls in Microsoft FrontPage. Similarly, when you remove an advanced control from your computer, it is automatically removed from that list.

You can specify which advanced controls you want to be available in FrontPage by adding or removing them from the list of advanced controls.This can be helpful because some of the advanced controls on your computer may not be suitable, or simply will not work, on a Web page. By removing them from the list you can help ensure that you don't use an inappropriate advanced control when you're designing a Web page.

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.