HotKeyNet is pretty simple...did you read the instructions?

http://hotkeynet.com/p/doc.html

There is a good explanation stickied, but here are some basics. The goal is to test each thing as you put them in place.

First I label my windows:

<Label MAIN local SendWinM Wow1>
<Label ALT local SendWinM Wow2>

So, your Window that you renamed Wow1 has been Labeled MAIN and the other ALT (only to be used inside the script).

Create a HotKey:

<Hotkey Spacebar>
<SendLabel MAIN>
<Key Spacebar>
<SendLabel ALT>
<Key Spacebar>

That will make everyone jump.

So, if you fire up HotKeyNet, open a notepad doc, and past this in there:

Code:
<Label MAIN local SendWinM Wow1>
<Label ALT local SendWinM Wow2>
<Hotkey Spacebar>
   <SendLabel MAIN>
      <Key Spacebar>
   <SendLabel ALT>
      <Key Spacebar>
Then rename your windows to Wow1 and Wow2 and load the scripts and turn it on, your spacebar will make everyone jump. HUZZAH!!!