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Modifying File Associations With Registry Editor

This describes how to modify file associations with the registry editor.  As an example assume we have a file of type .abc and two different editors of MyEditor1.exe and MyEditor2.exe. 

1. Associate the extension with a filename string:

HKEY_CLASSES_ROOT\.abc

Add a default string of "abcfile"

2. Associate 1:

Create the following key:

HKEY_CLASSES_ROOT\abcfile\shell\Open                                    // Note that this key "Open" is the default verb

Add the string: &Open with MyEditor1

Create the following key:

HKEY_CLASSES_ROOT\abcfile\shell\open EVC3\command

Add the string:   DriveLetter:\PathToFile\MyEditor1.exe

3. Associate  2:

HKEY_CLASSES_ROOT\abcfile\shell\Open MyEditor2              

Add the string: &Open with MyEditor2

Create the following key:

HKEY_CLASSES_ROOT\abcfile\shell\open EVC3\command

Add the string:   DriveLetter:\PathToFile\MyEditor2.exe

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