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How to Use the Assoc Command to Change File Associations

This article was previously published under Q184082
SUMMARY
This article describes how to use the Assoc command to display or changefile extensions and their associations.
MORE INFORMATION
The Assoc command can be run only from a command prompt.

NOTE: When you use the Assoc command, the changes you make are immediatelywritten to the Software registry file.

  • To display a list of file extensions and their associations, type assoc at a command prompt, and then press ENTER.
  • To display the association for a specific file extension, type assoc .<xxx> at a command prompt, and then press ENTER, where <xxx> is the file extension whose association you want to view.
  • To change the association for a specific file extension, type assoc .<xxx>=<file type> at a command prompt, and then press ENTER, where <xxx> is the file extension whose association you want to change, and <file type> is the program, dynamic data exchange (DDE), or OLE object you want to associate with the file extension.
  • To delete the association for a specific file extension, type assoc .<xxx>= at a command prompt, and then press ENTER, where <xxx> is the file extension you want to delete.

    NOTE: You must type the trailing space after the equal sign (=). If you do not, the association is not deleted and you receive the following error message:
    File association not found for extension .<xxx>
Properties

Article ID: 184082 - Last Review: 10/31/2006 19:06:44 - Revision: 1.1

  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • Microsoft Windows NT Server 4.0 Standard Edition
  • Microsoft Windows NT Server 4.0 Enterprise Edition
  • kbenv kbhowto KB184082
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