how to switch profiles when macro is triggered

I have a macro bound to C that holds down the ALT button. After pressing C I want the macro to then switch to another profile where C is ALT button up. So far I have found no way to change profile from within a macro. One thing I tried was using F5 to switch profiles (which works when I actually hit F5 manually) but when I tell the C macro to press F5 after holding down ALT it does not work. Is there any way to do what I am trying to do? Thanks