Not supported. Retrieves the URL of a page that can be used to install additional search providers.
pbstrUrl = window.external.SearchGuideUrl()
String that contains the alternate URL from the registry, or the default URL if an alternate has not been set.
Permission denied (0x80070005) Method is not allowed in the current domain.
SearchGuideUrl was introduced in Windows Internet Explorer 7.
This method can only be called from a "first run" page in the correct domain.