How do switch between pivot selection per hotkey?

Hi,
in 3ds max i have 3 modes to switch the pivot selection.

Pivot Point Center
Use Selection Center
Use Transform Coordinate center

for faster work, i will switch it per hotkey. But in the Hotkey-Editor i don't find a name like and the max script listener has no print from it.

Has anyone tried to grab this per script or found a Hotkey-Editor name?

regards,
Ulrich