Applications can use Performance Data Helper (PDH) APIs to collect performance data on Windows NT 4.0 and Windows 2000. The Windows 2000 operating system comes with PDH.dll. For Windows NT 4.0, a redistributable version of PDH.dll is available. This article provides access to this redistributable version of PDH.dll.

Back to the top

Performance Data Helper DLL (PDH.dll) for Windows NT 4.0

NOTE: For Windows 2000-based systems, use the system-supplied Pdh.dll file. Do not install a new version of Pdh.dll over the system-supplied version. This will fail because of Windows File Protection.

For Windows NT 4.0, install Pdh.dll into the private directory of the application (not into the system directory).

You have the following nonexclusive, royalty-free rights subject to the Distribution Requirements: The latest redistributable PDH.dll for Windows NT 4.0 that can be used by applications can be downloaded by clicking on the link below.
Release Date: NOV-7-2000

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base: Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. The NT4PDHDLL.exe file contains the following files:

File name	Size
PDH.dll	151,312
PDH.dbg	8,392
PDH.pdb	140,288
Redist.txt	612

A redistributable version of PDH.dll can also be directly downloaded from the Microsoft Platform SDK Web site: After this has been installed, the PDH.dll can be found in the x86 subfolder. The version of PDH.dll is 5.0.2195.2668.

Back to the top