This article describes how to determine if either Microsoft Windows SharePoint Services or FrontPage Server Extensions from Microsoft is installed and is in use on a Web server that is running Microsoft Internet Information Services (IIS). Sometimes, certain programs may have to programmatically detect if Windows SharePoint Services or if FrontPage Server Extensions is in use. This article describes how to check the registry to determine if either Windows SharePoint Services or FrontPage Server Extensions is in use on a Web server.

How to determine if Windows SharePoint Services is installed on the Web server

To determine if Windows SharePoint Services is installed on the Web server, follow these steps.

Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate and then click the following registry key:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\6.0
3. In the right pane, look to see if a SharePoint registry entry that has a value of Installed is listed. If the SharePoint registry entry that has a value of Installed is listed, Windows SharePoint Services is installed on the computer.
4. Quit Registry Editor.

How to determine if Windows SharePoint Services or if FrontPage Server Extensions is in use

To determine if Windows SharePoint Services or if FrontPage Server Extensions is in use, look to see if the following registry key contains any subkeys: To do this, follow these steps.

Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate and then double-click the following registry key:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\Ports
3. Look to see if the
   Ports
   registry key contains any subkeys. If subkeys are present, either Windows SharePoint Services or FrontPage Server Extensions is installed on that virtual server.
   
   For example, if the Default Web Site in IIS is extended with Windows SharePoint Services or with FrontPage Server Extensions, the
   Ports
   registry key contains the following subkey:
   Port /LM/W3SVC/1:
4. Quit Registry Editor.

For more information about Windows SharePoint Services, visit the following Microsoft Web site: For more information about FrontPage Server Extensions, visit the following Microsoft Web site: