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Customizing what files you can preview is cool, but is there a way to create a custom preview extension to add syntax highlighting? I have many .h, .c, .cpp, .cs and .java files on my windows machine and it would be nice to have the syntax highlighting available via explorer's new preview pane.

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Currently it is not available and there is no add-on I can find anywhere. It has been discussed and commented about so no doubt there is demand for it. I expect an extension to come out soon.

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It's not because it's discussed and commented that it will be released soon? Unless you're busy on it now ;-) . It would be easier, I think, if they could reuse the editing component of a syntax-highlighting editor like PSPad, Textpad, Notepad++, ... – Snark Nov 6 '09 at 17:16
I said I "expect". Not "it will". – John T Nov 6 '09 at 17:43
Hum, then I'll need to check my En-Fr dictionary again for the meaning of "to expect" :-/ – Snark Nov 6 '09 at 19:03
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up vote 2 down vote

Just found this that supports the formats below:

http://www.smartftp.com/client/addons/sourcepreview.php

ActionScript (.as, .mx) ASP (.asp) ASPX (.aspx) AutoIt (.au3) Bash (.sh, .bsh) Batch (.bat, .cmd) Caml (.ml, .mli, .sml, .thy) C (.c) C++ (.cpp, .cxx, ,.cc, .h, .hxx, .rgs) C# (.cs) CSS (.css) Diff (.diff, .patch) Fortran (.f, .for, .f90, .f95, .f2k) Ini (.ini, .inf, .reg, .url) Inno Setup (.iss) Java (.java) JavaScript (.js) Lisp (.lsp, .lisp) Makefile (.mak) Matlab (.m) NFO (.nfo) NSIS (.nsi, .nsh) Pascal (.pas, .inc) Perl (.pl, .pm, .plx) PHP (.php, .php3, .phtml) Python (.py, .pyw) Resource (.rc) Smalltalk (.st) TeX (.tex) SQL (.sql) VB (.vb) VBScript (.vbs) XML (.xml, .xsd, .xsml, xsl, .kml)

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+1, this is exactly what I needed – leoluk Apr 9 '11 at 20:40
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up vote 1 down vote

There's an extension that supports many common coding formats here: http://blog.tatham.oddie.com.au/2006/12/20/vista-and-office-2007-preview-handler-pack-released/

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up vote 1 down vote

There is a Code Preview Handler, but it supports only the extensions .cs, .vb, .js and .sql . The source code is available and it doesn't look too complex to create a Preview Handler (well, sort of, I wouldn't know how to do one).

I tried adding other extensions to the Code Preview Handler with the tool Preview Handler Editor but it doesn't work, the preview pane is blank (at least for the .pl files I tried).

alt text

Edit: you have also a pack of Preview Handlers here, that support the following filetypes:

* ActionScript (.as) 
* ASPX (.aspx)
* C# (.cs)
* CSS (.css)
* Diff (.diff, .patch)
* DOS (.bat, .cmd)
* JavaScript (.js)
* Ruby (.rb, .rhtml, .rjs) thanks to Ivan Porto Carrero
* SQL (.sql)
* VB (.vb)
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