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Definition of Registry Value Data Types

This article was previously published under Q101230
This article has been archived. It is offered "as is" and will no longer be updated.
WARNING: Using Registry Editor incorrectly can cause serious, system-wideproblems that may require you to reinstall Windows NT to correct them.Microsoft cannot guarantee that any problems resulting from the use ofRegistry Editor can be solved. Use this tool at your own risk.

This article describes the different data types for key values in theWindows NT Registry:

  • REG_SZ


This is the raw binary data. Most hardware component information isstored as binary data, and can be displayed in Registry Editor inhexadecimal format, or displayed in WinMSD in an easy-to-read format.For example:
   Component Information : REG_BINARY : 00 00 00...


This is data represented by a number that is four bytes long. Manyparameters for device driver and services are this type, and can bedisplayed in Registry Editor in binary, hexadecimal, or decimalformat. For example, entries for service error controls are this type:
ErrorControl : REG_DWORD : 0x1


An expandable data string that is text containing a variable to bereplaced when called by an application. For example, for the followingvalue, the string "%SystemRoot%" will replaced by the actual locationof the directory containing the Windows NT system files:
   File : REG_EXPAND_SZ : %SystemRoot%\file.exe


This is a multiple string. Values that contain lists or multiplevalues in human readable text are usually this type. Entries areseparated by NULL characters. For example, the following value entryspecifies the binding rules for a network transport:
   bindable : REG_MULTI_SZ : dlcDriver dlcDriver non non 50


This is a sequence of characters representing human readable text. Forexample, a component's description is usually this type:
   DisplayName : REG_SZ : Messenger
prodnt winnt

Article ID: 101230 - Last Review: 12/04/2015 09:32:49 - Revision: 2.1

Microsoft Windows NT Advanced Server 3.1, Microsoft Windows NT Workstation 3.1, Microsoft Windows NT Advanced Server 3.1

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