osx - How can I determine the arguments for a private API function? -

I want to make replacement for app switcher (aka 'CMD + tab')

I know that this is possible because Light Switch X does this.

What I have achieved so far:

Leaving the Dock and CPSRegisterForKey () (which is a private API function) I can go to the default CMD + tab I can stop working.

The second step two registers the hot key for my app. The standard way of doing this, RegisterEventHotKey () , does not work is a small suggestion of Googling and GDBing I use the dock and the light switch x to use the CGSSetHotKeyEnabled () and CGSSetHotKey () (both of which have private API functions) I have the problem that I do not know this What logic do these tasks take?

How do I set the argument for a private API function?

Update:

me CGSSetHotKey () :

OSErr setupResult = CGSSetHotKey ( _CGSDefaultConnection (), unknownArg, unknown erg, unknownArg, kCGEventFlagMaskCommand, ???, ???, ...);

Have you tried to experiment? This is usually very useful.