Thanks for the kind words. HotkeyNet was designed as a hotkey program, not a broadcaster, so I built a limitation into the program to protect people from certain errors -- it doesn't allow you to define shift, ctrl and alt by themselves as triggers. Therefore you can't broadcast those keys by pressing them.

I plan to remove this limitation soon. In the meantime you can define as hotkeys every combination of modifer plus main key. I'm not sure if that serves your purposes or not.

Olipc's suggestion will work fine. (I think he knows the program better than I do. ) Here's an alternative way using the built-in list "AllMainKeys."

Code:
<KeyList MyList AllMainKeys except Tab>

<Hotkey MyList; Shift MyList; Alt MyList; Ctrl MyList>
<SendLabel L1, L2, L3...>
<Key %Trigger%>
If you use that you'll need to exclude movement keys from your key list and define them separately with MovementHotkey.