[Freeswitch-users] how to: get session variable after api_hangup_hook

Hello, I write a custom cpp module for freeswitch that exposes an API: SWITCH_ADD_API(commands_api_interface, "my_hangup", "my_hangup", my_hangup_api , MY_HANGUP_USAGE); I want to call this api from dialplan (after bridge hangup) for reading the variable "billmsec". I put this into my dialplan: <action application="set" data="session_in_hangup_hook=true"/> <action application="set" data="api_hangup_hook=my_hangup_api"/> After hangup freeswitch call correctly my API but I have not figured out how to get the variable.