Consider the following scenario. You develop an application that hosts the WebBrowser control. Then, you move to a link in the WebBrowser control. In this scenario, you expect the BeforeNavigate2 event to be triggered before the target page is loaded. However, when you run this application on a Windows Vista-based computer, the BeforeNavigate2 event is not triggered when you move to a non-standard link.

Note: A non-standard link refers to a link that has special characters and whose URL does not start with http, with https, with ftp, or with other known protocols.

For example, the HREF tag of the link in question is one of the following:

• <a href="<ABCD>">
• <a href= "/?scid=abcd%7cab12ab3l">

Therefore, the BeforeNavigate2 event cannot be used in the application.

Note: This issue does not occur in Windows XP or in Windows Server 2003.