Tunnel.dll

This proof of concept tool demonstrates Header Navigation in-process in the Internet Explorer application using a dynamic link library (DLL) application. Tunnel.dll provides a user with a tree view component that contains a list of headers on a Web page and allows users to quickly navigate to the point in the page where each header occurs. The Tunnel.dll application and other projects related to improving navigation in Web documents is described in detail in the Working on Accessible Web Content Guidelines and Designing More Usable Documents report. Instructions for downloading and installing the file are available on this page.

Installing Tunnel.dll

1. Download Tunnel.dll and copy it to the folder where Internet Explorer resides (usually C:\Program Files\Internet Explorer)
2. Open a DOS window (Start --> Programs --> MS-DOS Prompt)
3. Navigate to the directory containing tunnel
   • cd ..
   • cd progra~1
   • cd intern~1
4. Type:
   • c:\windows\system\regsvr32.exe tunnel.dll
5. You should get a confirmation dialog box
   
6. To remove tunnel.dll from you system, follow steps 1-3 above and type:
   • c:\windows\system\regsvr32.exe /u tunnel.dll

Note: Regsvr32.exe is included with Microsoft Internet Explorer 3.0 or later, Windows 95 OEM Service Release 2 (OSR2) or later, and Windows NT 4.0 Service Pack 5 (SP5) or later. Regsvr32.exe is installed in the System (Windows Me/98/95) or System32 (Windows NT) folder.

Using Tunnel.dll

Once you have installed Tunnel.dll, you can view the list of headers available on the page by selcting View --> Explorer Bar --> Headers List. You can then navigate the headers tree using the commands listed below.

• Ctrl + D - Move to Next Header
• Ctrl + Shift + D - Move to Previous Header