Open the Registry Editor.
2. Navigate to the Registry key for the filename extension you want to
modify. For instance, if you want to enable icon previews for TIFF files,
go to HKEY_CLASSES_ROOT\.tif.
3. Look for a PerceivedType value inside the .tif key. If it??™s not there,
select Edit ??? New ??? String Value, and type PerceivedType for its name.
4. Double-click the PerceivedType value, type image for its contents, and
click OK.
5. Next, navigate to HKEY_CLASSES_ROOT\SystemFileAssociations\image. As
described in ???Expand the Scope of Your File Types,??? later in this chapter,
this key provides common properties for all image files, such as .jpg,
.bmp, and .tif files.
6. Open the ShellEx key, and look for a key named {BB2E617C-0920-11d1-
9A0B-00C04FC2D6C1}. If it??™s not there, select Edit ??? New ??? Key, and type
{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1} for the name of the new key.
7. Open the {BB2E617C-0920-11d1-9A0B-00C04FC2D6C1} key, and double-click
the (Default) value. Type {3F30C968-480A-4C6C-862D-EFC0897BB84B} for
its contents, and click OK when you??™re done.
Of the two Class IDs mentioned here, {BB2E617C-0920-
11d1-9A0B-00C04FC2D6C1} connects the file type to
Windows Explorer??™s Preview pane, and {3F30C968-480A-
4C6C-862D-EFC0897BB84B} points to Windows??™ own
PhotoMetadataHandler.dll, the .dll file responsible for generating
icon previews for all supported photo file formats.
8. The change should take effect immediately; if not, restart Windows to
see the new icons.
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