This article tells you where you can download the Microsoft Windows HTTP Services 5.1 (WinHTTP 5.1) certificates and trace tools.
With the release of version 5.1, WinHTTP is now a component in the following operating systems:
Windows Server 2003 family.
Windows XP, Service Pack 1.
Windows 2000, Service Pack 3 (except Datacenter Server)
However, the tools for WinHTTP 5.1 are not included as a part of the operating system or platform Software Development Kit (SDK). You can download the WinHTTP 5.1 tools as part of the Windows Server 2003 Resource Kit Tools. The Windows Server 2003 Resource Kit includes the following WinHTTP 5.1 tools:
Note The Windows Server 2003 Resource Kit Tools only allow you to install WinHTTP 5.1 tools on Windows Server 2003 and on Windows XP.
WinHTTP 5.1 also includes a proxy configuration tool, Proxycfg.exe. Proxycfg.exe is the proxy configuration tool that is included with Windows Server 2003. For more information and documentation about Proxycfg.exe, visit the following Microsoft Developer Network Web site: