Windows allows for application protocols in which, through the registry, you specify a URL scheme and a command line to have that URL passed to your application. Its an easy way to hook a webbrowser up to your application. Anyone can read the doc above and then walk through the registry and pick out the application protocols but just from that info you can't tell what the application expects these URLs to look like. I did a bit of research on some of the application protocols I've seen which is listed below. Good places to look for information on URI schemes: Wikipedia URI scheme, and ESW Wiki UriSchemes.
| Scheme | Name | Notes |
|---|---|---|
| search-ms | Windows Search Protocol |
The search-ms application protocol is a convention for querying the Windows Search index. The protocol enables applications, like Microsoft Windows Explorer, to query the index with
parameter-value arguments, including property arguments, previously saved searches, Advanced Query Syntax, Natural Query Syntax, and language code identifiers (LCIDs) for both the Indexer and
the query itself. See the MSDN docs for search-ms for more info. Example: search-ms:query=food |
| Explorer.AssocProtocol.search-ms | ||
| OneNote | OneNote Protocol |
From the OneNote help: /hyperlink "pagetarget" - Starts OneNote and opens the page specified by the pagetarget parameter. To obtain the hyperlink for any page in a OneNote
notebook, right-click its page tab and then click Copy Hyperlink to this Page.Example: onenote:///\\GUMMO\Users\davris\Documents\OneNote%20Notebooks\OneNote%202007%20Guide\Getting%20Started%20with%20OneNote.one#section-id={692F45F5-A42A-415B-8C0D-39A10E88A30F}&end |
| callto | Callto Protocol |
ESW Wiki Info on callto Skype callto info NetMeeting callto info Example: callto://+12125551234 |
| itpc | iTunes Podcast |
Tells iTunes to subscribe to an indicated podcast. iTunes documentation. C:\Program Files\iTunes\iTunes.exe /url "%1" Example: itpc:http://www.npr.org/rss/podcast.php?id=35 |
| iTunes.AssocProtocol.itpc | ||
| pcast | ||
| iTunes.AssocProtocol.pcast | ||
| Magnet | Magnet URI | Magnet URL scheme described by Wikipedia. Magnet URLs identify a resource by a hash of that resource so that when used in P2P scenarios no central authority is necessary to create URIs for a resource. |
| mailto | Mail Protocol |
RFC 2368 - Mailto URL Scheme. Mailto Syntax Opens mail programs with new message with some parameters filled in, such as the to, from, subject, and body. Example: mailto:?to=david.risney@gmail.com&subject=test&body=Test of mailto syntax |
| WindowsMail.Url.Mailto | ||
| MMS | mms Protocol |
MSDN describes associated protocols. Wikipedia describes MMS. "C:\Program Files\Windows Media Player\wmplayer.exe" "%L" Also appears to be related to MMS cellphone messages: MMS IETF Draft. |
| WMP11.AssocProtocol.MMS | ||
| secondlife | [SecondLife] |
Opens SecondLife to the specified location, user, etc. SecondLife Wiki description of the URL scheme. "C:\Program Files\SecondLife\SecondLife.exe" -set SystemLanguage en-us -url "%1" Example: secondlife://ahern/128/128/128 |
| skype | Skype Protocol |
Open Skype to call a user or phone number. Skype's documentation Wikipedia summary of skype URL scheme "C:\Program Files\Skype\Phone\Skype.exe" "/uri:%l" Example: skype:+14035551111?call |
| skype-plugin | Skype Plugin Protocol Handler |
Something to do with adding plugins to skype? Maybe. "C:\Program Files\Skype\Plugin Manager\skypePM.exe" "/uri:%1" |
| svn | SVN Protocol |
Opens TortoiseSVN to browse the repository URL specified in the URL. C:\Program Files\TortoiseSVN\bin\TortoiseProc.exe /command:repobrowser /path:"%1" |
| svn+ssh | ||
| tsvn | ||
| webcal | Webcal Protocol |
Wikipedia describes webcal URL scheme. Webcal URL scheme description. A URL that starts with webcal:// points to an Internet location that contains a calendar in iCalendar format. "C:\Program Files\Windows Calendar\wincal.exe" /webcal "%1" Example: webcal://www.lightstalkers.org/LS.ics |
| WindowsCalendar.UrlWebcal.1 | ||
| zune | Zune Protocol |
Provides access to some Zune operations such as podcast subscription (via Zune Insider). "c:\Program Files\Zune\Zune.exe" -link:"%1" Example: zune://subscribe/?name=http://feeds.feedburner.com/wallstrip. |
| feed | Outlook Add RSS Feed |
Identify a resource that is a feed such as Atom or RSS. Implemented by Outlook to add the indicated feed to Outlook. Feed URI scheme pre-draft document "C:\PROGRA~2\MICROS~1\Office12\OUTLOOK.EXE" /share "%1" |
| im | IM Protocol |
RFC 3860 IM URI scheme description Like mailto but for instant messaging clients. Registered by Office Communicator but I was unable to get it to work as described in RFC 3860. "C:\Program Files (x86)\Microsoft Office Communicator\Communicator.exe" "%1" |
| tel | Tel Protocol |
RFC 5341 - tel URI scheme IANA assignment RFC 3966 - tel URI scheme description Call phone numbers via the tel URI scheme. Implemented by Office Communicator. "C:\Program Files (x86)\Microsoft Office Communicator\Communicator.exe" "%1" |
More of my thoughts have been stolen: In my
previous job the customer wanted a progress bar displayed while information was copied off of proprietary hardware, during which the software didn't get any indication of progress until the copy
was finished. I joked (mostly) that we could display a progress bar that continuously slows down and never quite reaches the end until we know we're done getting info from the hardware. The amount
of progress would be a function of time where as time approaches infinity, progress approaches a value of at most 100 percent.
This is similar to Zeno's Paradox which says you can't cross a room because to do so first you must cross half the room, then you must cross half the remaining distance, then half the remaining again, and so on which means you must take an infinite number of steps. There's also an old joke inspired by Zeno's Paradox. The joke is the prototypical engineering vs sciences joke and is moderately humorous, but I think the fact that Wolfram has an interactive applet demonstrating the joke is funnier than the joke itself.
I recently found Lou Franco's blog post "Using Zeno's Paradox For Progress Bars" which covers the same concept as Zeno's Progress Bar but with real code. Apparently Lou wasn't making a joke and actually used this progress bar in an application. A progress bar that doesn't accurately represent progress seems dishonest. In cases like the Vista Defrag where the software can't make a reasonable guess about how long a process will take the software shouldn't display a progress bar.
Similarly a paper by Chris Harrison "Rethinking the Progress Bar" suggests that if a progress bar speeds up towards the end the user will perceive the operation as taking less time. The paper is interesting, but as in the previous case, I'd rather have progress accurately represented even if it means the user doesn't perceive the operation as being as fast.
Update: I should be clearer about Lou's post. He was actually making a practical and implementable suggestion as to how to handle the case of displaying progress when you have some idea of how long it will take but no indications of progress, whereas my suggestion is impractical and more of a joke concerning displaying progress with no indication of progress nor a general idea of how long it will take.
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