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I've a Logitech Media Keyboard 600 which features a separate button to launch the calculator. I need that quite often, but the Windows shipped calculator is useless; there are more advanced out there.

So I've installed another calculator application and want this special key start this other app instead of the default one.

Is that possible?

I'm not searching for a solution to pin the app to the taskbar and use another shortcut key to launch it.

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  • 1
    The new calculator in Win7 is really good. What do you find better?
    – paradroid
    Sep 25, 2010 at 22:17
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    E.g. PowerToys Calculator for WXP, didn't work for W7 but SpeedCrunch does. Need something with history and such.
    – mark
    Sep 25, 2010 at 23:56
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    @mark, you may want to consider that Tim C's answer is less invasive than the accepted answer and seems to be the ideal solution.
    – jnm2
    May 14, 2015 at 12:36

2 Answers 2

Reset to default
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Did you try Logitech's SetPoint software? It may not let you change what program the key opens, but it's worth a try. I don't have a Logitech keyboard, so I can't check.

You could also try replacing the Calculator executable (%windir%\system32\calc.exe) with the other calculator, but that may be risky.

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  • That's it! I always avoid this vendor supplied software, have had too much bad experience with it the last 15 years .. but seems time changes ;-) With this software you can configure the key to run any app you want.
    – mark
    Sep 26, 2010 at 0:13
  • Good to hear! I was guessing a little, since the Logitech website doesn't specify which keys are programmable. Some keyboards have programmable keys but don't let you modify media/special function keys.
    – Velociraptors
    Sep 26, 2010 at 0:36
86

Edit this registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\AppKey\18\ShellExecute

If it does not exist, create a String Value with name ShellExecute and as value the path to your program.

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    Thanks, that was also helpful and works without the need to install any software!
    – mark
    Oct 4, 2010 at 12:27
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    Mine is 'HKEY_LOCAL_MACHINE' rather than 'HKLM'.
    – Twinbee
    May 4, 2013 at 15:38
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    'HKLM' is a std. abbr. for 'HKEY_LOCAL_MACHINE'
    – Mark Cidade
    Sep 19, 2013 at 15:22
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    On Windows 10 HKLM/software/microsoft/windows/currentversion/explorer/appkey/18 is empty. Edit: ShellExecute is a String Value that you have to make, and it's value should be the full path.
    – Mark Jeronimus
    Jun 29, 2016 at 16:19
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    now for the grand prize, someone tell me how to launch a Windows 10 app from within there) There's an amazing calculator called Console Calculator in the Windows store. It's a metro app, not to be confused with the quite similar console calculator regular windows application, which is also good but I like this windows 10 app better
    – Mikey
    Sep 14, 2017 at 2:49

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