HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows
| Data type | Range | Default value |
|---|---|---|
| REG_SZ | File name extensions | (Blank value) |
Defines files to be considered documents by Windows 2000. Enter the file name extensions without the preceding periods, and separate the extensions from each other with a space.
Use this entry only to define document file name extensions that are not associated with any application and are not listed in the Extensions subkey.
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