DOCUMENT:Q184082 09-AUG-2001 [winnt] TITLE :How to Use the Assoc Command to Change File Associations PRODUCT :Microsoft Windows NT PROD/VER:WINNT:4.0 OPER/SYS: KEYWORDS:kbenv ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation version 4.0 - Microsoft Windows NT Server version 4.0 - Microsoft Windows NT Server, Enterprise Edition version 4.0 ------------------------------------------------------------------------------- SUMMARY ======= This article describes how to use the Assoc command to display or change file 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 immediately written to the Software registry file. - To display a list of file extensions and their associations, type "assoc" (without the quotation marks) at a command prompt, and then press ENTER. - To display the association for a specific file extension, type "assoc ." (without the quotation marks) at a command prompt, and then press ENTER, where is the file extension whose association you want to view. - To change the association for a specific file extension, type "assoc .=" (without the quotation marks) at a command prompt, and then press ENTER, where is the file extension whose association you want to change, and 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 .= " (without the quotation marks) at a command prompt, and then press ENTER, where 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 . ====================================================================== Keywords : kbenv Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400search kbWinNTS400 Version : WINNT:4.0 Issue type : kbhowto ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.