The Macros tool allows you to make the function keys act as they were you typing a pre-defined string.

 

As you can see, the first step is to define the links by selecting Tools/Macros/Define:

In this screen, you can edit your macros.  Note that the macros have a name, and that the value is the string that the key represents.  In order to handle Control+ and Alt+ key combinations you can use:

Key		Meaning
Ctrl+	^(xxx)	Where xxx are the keystrokes.
Alt+	%(xxx)	Where xxx are the keystrokes.

 In the example above, F12 would produce ALT+T and ALT+Q.