Rebinding Keys on a Dell Keyboard
Solution 1:
It looks like you're going to need some additional software to do this for you. There's some excellent links here and here.
In particular:
NirCmd is an application that changes the volume and more.
Example of use:
* Increase the system volume by 2000 units (out of 65535)
nircmd.exe changesysvolume 2000
* Decrease the system volume by 5000 units (out of 65535)
nircmd.exe changesysvolume -5000
* Set the volume to the highest value
nircmd.exe setsysvolume 65535
Solution 2:
You can perform "key rebinding" on Windows for any keyboard using AutoHotKey. Here are some examples (from my AutoHotKey startup configuration) that show how to control the sound card:
#z::Send,{VOLUME_MUTE}
#=::SoundSet,+5
#-::SoundEet,-5
Capslock::Send,{MEDIA_PLAY_PAUSE}
('#' means the Windows Key, you can also specify any combination of control, shift, and alt keys).