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Re: JScript - is a file of a known Type?

From "Mayayana" <mayayana@invalid.nospam>
Newsgroups microsoft.public.scripting.jscript, microsoft.public.scripting.vbscript, comp.lang.javascript
Subject Re: JScript - is a file of a known Type?
Date 2012-01-04 09:18 -0500
Organization A noiseless patient Spider
Message-ID <je1mtu$50r$1@dont-email.me> (permalink)
References <3wJilUEcZzAPFwTs@invalid.uk.co.demon.merlyn.invalid> <je0ce6$3q1$1@dont-email.me> <je0plc$u6g$1@news.albasani.net>

Cross-posted to 3 groups.

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I'm still not sure I get what Dr J R Stockton is after,
but the Registry system is straightforward.

HKCR\.txt default value: "txtfile"
HKCR\txtfile default value: "Text Document"

PerceivedType is not related to file registration. According
to MS it's actually meant to be used with Windows
Find/Search.
http://msdn.microsoft.com/en-us/library/aa965719%28v=vs.85%29.aspx

  Unless someone is building a shell view I don't see the
point of needing the file type's class name. The only need for
that in the first place is so that the way of looking up files
can work despite changes: If Firefox takes over .html from IE,
or IE changes it back, the current status can still be tracked
via HKCR\.html.

The existence of HKCR\.txt confirms that it's a registered type.
The HKCR\[extension key default value] (HKCR\txtfile\) subkeys
then provide other information, like icon, default program for
that file type, etc.

  I see what you mean about .x. I wonder how such a key got
written in the first place. It doesn't have any purpose that I
can see. I have very few of those in my Registry. The only
thing I can guess is that some uninstallers remove the default
value for a program's extensions during uninstall but don't
remove the extension key itself.

 In any case, it doesn't change the design. "Text" is
not a registered file type. .x is not really registered. So I
guess I should amend what I said above: To be thorough
one should confirm there's a default program for a file type,
under:
HKCR\[extension key default value]\shell\open\command\

  That gets back to why anyone cares about the registered
file type name in the first place. Usually the point of looking
up this info. is to find the default program.


-- 
--
"Todd Vargo" <tlvargo@sbcglobal.netz> wrote in message 
news:je0plc$u6g$1@news.albasani.net...
| On 1/3/2012 9:13 PM, Mayayana wrote:
| > I'm not sure I understand. Do you mean you want to
| > find out if it's a registered file type? That would be
| > in HKCR. If OK6 is registered there will be a key
| > HKCR\.ok6
|
| Correct. However getting the string for the file type requires a bit
| more effort. Some extensions have their type in the default string.
| While others provide the name to another key where the real string must
| be read.
|
| For example, on my system the default string for .bmp is Paint.Picture
| which you then find there is an Paint.Picture key where you find the
| file type is "Bitmap Image".
|
| And some, like .x, store the type in a string named "PerceivedType".
|
| -- 
| Todd Vargo
| (Post questions to group only. Remove "z" to email personal messages)

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Thread

JScript - is a file of a known Type? Dr J R Stockton <reply1201@merlyn.demon.co.uk> - 2012-01-03 17:09 +0000
  Re: JScript - is a file of a known Type? "Mayayana" <mayayana@invalid.nospam> - 2012-01-03 21:13 -0500
    Re: JScript - is a file of a known Type? Todd Vargo <tlvargo@sbcglobal.netz> - 2012-01-04 00:55 -0500
      Re: JScript - is a file of a known Type? "Mayayana" <mayayana@invalid.nospam> - 2012-01-04 09:18 -0500
        Re: JScript - is a file of a known Type? "Dave \"Crash\" Dummy" <invalid@invalid.invalid> - 2012-01-04 09:40 -0500
          Re: JScript - is a file of a known Type? "Mayayana" <mayayana@invalid.nospam> - 2012-01-04 10:23 -0500
            Re: JScript - is a file of a known Type? Todd Vargo <tlvargo@sbcglobal.netz> - 2012-01-04 20:22 -0500
            Re: JScript - is a file of a known Type? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-05 22:01 -0800
              Re: JScript - is a file of a known Type? John G Harris <john@nospam.demon.co.uk> - 2012-01-06 11:04 +0000
                Re: JScript - is a file of a known Type? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-06 04:26 -0800
                Re: JScript - is a file of a known Type? John G Harris <john@nospam.demon.co.uk> - 2012-01-06 14:58 +0000
                Re: JScript - is a file of a known Type? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-06 12:27 -0800
              Re: JScript - is a file of a known Type? Dr J R Stockton <reply1201@merlyn.demon.co.uk> - 2012-01-07 21:54 +0000
          JScript - WScript output similar to CScript output> Dr J R Stockton <reply1201@merlyn.demon.co.uk> - 2012-01-05 20:29 +0000
            Re: JScript - WScript output similar to CScript output> "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-05 22:05 -0800
              Re: JScript - WScript output similar to CScript output> Bwig Zomberi <zomberiMAPSONNOSPAM@gmail.invalid> - 2012-01-06 14:31 +0530
                Re: JScript - WScript output similar to CScript output> Dr J R Stockton <reply1201@merlyn.demon.co.uk> - 2012-01-07 21:14 +0000
              Re: JScript - WScript output similar to CScript output> Dr J R Stockton <reply1201@merlyn.demon.co.uk> - 2012-01-07 21:10 +0000
                Re: JScript - WScript output similar to CScript output> "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-08 14:52 -0800
                Re: JScript - WScript output similar to CScript output> Dr J R Stockton <reply1202@merlyn.demon.co.uk> - 2012-01-09 23:45 +0000
                Re: JScript - WScript output similar to CScript output> Todd Vargo <tlvargo@sbcglobal.netz> - 2012-01-10 00:27 -0500
                Re: JScript - WScript output similar to CScript output> Dr J R Stockton <J.R.Stockton@physics.org> - 2012-01-10 13:40 -0800
                Re: JScript - WScript output similar to CScript output> "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-10 17:04 -0800
                Re: JScript - WScript output similar to CScript output> Dr J R Stockton <reply1202@merlyn.demon.co.uk> - 2012-01-12 23:43 +0000
                Re: JScript - WScript output similar to CScript output> "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-12 22:36 -0800
                Re: JScript - WScript output similar to CScript output> "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-12 22:47 -0800
                Re: JScript - WScript output similar to CScript output> Dr J R Stockton <J.R.Stockton@physics.org> - 2012-01-14 12:15 -0800
            Re: JScript - WScript output similar to CScript output> Bwig Zomberi <zomberiMAPSONNOSPAM@gmail.invalid> - 2012-01-06 14:43 +0530
            Re: JScript - WScript output similar to CScript output> Todd Vargo <tlvargo@sbcglobal.netz> - 2012-01-06 05:20 -0500
              Re: JScript - WScript output similar to CScript output> "Mayayana" <mayayana@invalid.nospam> - 2012-01-06 08:33 -0500
                Re: JScript - WScript output similar to CScript output> Dr J R Stockton <reply1201@merlyn.demon.co.uk> - 2012-01-07 20:11 +0000

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