Okie dokie. I'll assume you want to click with the right button but it could be any button or any combination of keys and buttons. And I'll assume the shaman's LB is bound to Alt Shift F1, and that his HW is bound to Alt Ctrl F2:

Code:
<Hotkey RButton>
   <If MouseIsOverWindowRect Pally 200 200 100 100>
      <SendLabel Shaman>
         <Key Alt Shift F1>
   <Else If MouseIsOverWindowRect Pally 200 300 100 100>
      <SendLabel Shaman>
         <Key Alt Ctrl F2>
Please note that the numbers go X position, Y position, width, height.