If you have a Windows Mobile based portable device with a keyboard that contains function keys, you may have noticed that not all of the keys are available to be used as Hot Keys by ITScriptNet.  This happens because Windows Mobile has hard coded some function keys to system features.  You can see the list of keys here.  Although this article refers specifically to the Stand Alone emulator, some device manufacturers also follow it. 

Our experience is that Hand Held Products devices make all function keys available to applications, while Symbol devices do not.  You should test on your device to see which keys are available.

We have added a Knowledge Base article on this topic:
INFO: Not all function keys are available to ITScriptNet on Windows Mobile devices