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AutoHotkeyAutoHotkey (AHK) is a free, open-source macro-creation and automation software for Windows that allows users to automate repetitive tasks. It is driven by a scripting language that was initially aimed at providing keyboard shortcuts, otherwise known as hotkeys, that over time evolved into a full-fledged scripting language.

http://ahkscript.org/

To learn about AHK I recommend checking its site, pages mentioned in Quick Reference and especially skimming at least AutoHotkey Beginner Tutorial. Don't forget to download, install and fiddle with it yourself. There is also helpful forum.

In this case you should look particularly at following pages: Hotkeys (Mouse, Joystick and Keyboard Shortcuts), List of Keys, Mouse Buttons, and Joystick Controls and Send / SendRaw / SendInput / SendPlay / SendEvent: Send Keys & Clicks. Then you'll be able to assemble simple AHK script, e.g. something like:

Here you define following actions:

You create .ahk file, paste above code in it (w/o useless MsgBox, of course), save and double click to run it. You'll get H icon in systray allowing you to interact w/ the script, particularly: suspend hotkeys, pause script (not useful here) or just exit it. For better convenience I suggest compiling such script. You can do it using Right Button Mouse on the file and choosing Compile Script. Then you'll get .exe file (pretty big, but it's like complete autohotkey) that you can share w/ others or add to autostart for instance.

In AutoHotkey's Remapping Keys and Buttons page you can read about other way of assigning keys to keys, remapping. It may be not useful in your case (unless you're ready to "lose" some keys), but it's still worth reading. (Then you should figure out why I haven't used AHK remapping in my example.)

Let me quote it (w/o blockquote to preserve formatting) and fix some links along the way:

There are at least two methods to remap keys via the registry:

http://www.eventghost.org/

Haven't tried it, but looks interesting and a bit related, so I think it's worth mentioning it here.

Some SuperUsers may remember Girder, that unfortunately stopped being freeware long time ago. EventGhost seems somewhat similar. I no longer have AverMedia's TVPhone98, but using remote via Girder was fun.

More:
My keyboard has no "media" keys; can I ... - Super User