Article ID: 166320 - View products that this article applies to.
This article was previously published under Q166320
If you create a file association between a program and a file extension, you may then be unable to view, edit, or remove the file association from the File Types dialog box listing of registered file types.
File associations that are created without a description for the file type are not listed as a registered file type, even though they do function properly.
To change the association of a file type that does not appear in the Registered File Types list, follow these steps:
Microsoft is researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.
For additional information, please see the following article in the Microsoft Knowledge Base:
TITLE : Err Msg: The Extension '.<ext>' Is Already In Use By File...
Article ID: 166320 - Last Review: February 27, 2007 - Revision: 2.2