如何在Windows 7资源管理器中启用VBA代码等文件的预览功能？

Great question! Adding the PerceivedType registry string is exactly the right move to get these text-based file types showing up in Windows Explorer's preview pane. Here's a safe, step-by-step breakdown tailored to your needs:

First: Backup Your Registry (Critical!) #

Before tweaking any registry settings, it’s wise to back up the relevant keys or your entire registry. Here’s how:

• In Registry Editor (regedit), right-click the key you’re about to modify (e.g., HKEY_CLASSES_ROOT\.log) and select Export.
• Save the .reg file somewhere secure—this lets you revert changes if anything goes wrong.

Option 1: Manual Registry Editing #

Repeat these steps for each file type: .log, .list, .bas, .cls, .frm

1. Press Win + R, type regedit, and hit Enter. Confirm the User Account Control prompt if it appears.
2. Navigate to the registry key for your target file extension:
   • .log: HKEY_CLASSES_ROOT\.log
   • .list: HKEY_CLASSES_ROOT\.list
   • .bas: HKEY_CLASSES_ROOT\.bas
   • .cls: HKEY_CLASSES_ROOT\.cls
   • .frm: HKEY_CLASSES_ROOT\.frm
3. Right-click the extension key, hover over New, and select String Value.
4. Name the new string PerceivedType.
5. Double-click PerceivedType, set its Value data to text, and click OK.

Option 2: One-Click .reg File Import #

If you want to set up all these file types at once, create a registry import file:

1. Open Notepad and paste this code:

   Windows Registry Editor Version 5.00
   
   [HKEY_CLASSES_ROOT\.log]
   "PerceivedType"="text"
   
   [HKEY_CLASSES_ROOT\.list]
   "PerceivedType"="text"
   
   [HKEY_CLASSES_ROOT\.bas]
   "PerceivedType"="text"
   
   [HKEY_CLASSES_ROOT\.cls]
   "PerceivedType"="text"
   
   [HKEY_CLASSES_ROOT\.frm]
   "PerceivedType"="text"
   

2. Save the file as EnableTextPreview.reg (make sure Save as type is set to All Files to avoid adding a .txt extension).
3. Double-click the saved .reg file, confirm the prompts to import the settings into your registry.

Final Steps to Activate Changes #

After editing the registry:

• Restart Windows Explorer: Open Task Manager (Ctrl + Shift + Esc), find Windows Explorer under the Processes tab, right-click it, and select Restart.
• Ensure the preview pane is enabled: In Explorer, go to the View tab and check Preview pane.

Quick Note #

If any of these file types already have a PerceivedType entry (uncommon for most of these), just double-click it and change the value to text instead of creating a new entry. This tells Explorer to treat the file as a text document, triggering the same built-in previewer used for .txt files.

内容的提问来源于stack exchange，提问作者Tom the Toolman