Hi Ben,
Action = Sendkeys "{CTRL+F}"
So close! It's actually a minus rather than plus, so the correct form is:
Action = Sendkeys "{CTRL-F}"
This works with multiple modifiers also, e.g.:
Action = Sendkeys "{CTRL-ALT-F}"
Action = SendKeys "{CTRL-SHIFT-ESC}"
Action = Sendkeys "{ALT-WIN-ENTER}"
(That last one is actually the Windows shortcut to start Media Center.)
Eddy