Connecting to a VPN (vpnc) via DBus

[Adrien BUSTANY <madcat mymadcat com>]

Hi,
I'd like to write a script for Dispatcher to automatically connect to a 
VPN when I connect to some specific wlan. I saw some scripts on the 
internet, but they're not up to date with NM 0.7 api.
I saw the org.freedesktop.NetworkManager.VPN.Manager.Connect method, but 
I'm not sure what to pass as the arguments. I think the first is weither 
to use session or system bus, the second the name of the connection, the 
third the device (like wlan0, or its path in NetworkManager/Device ?), 
and I've no idea about the last.
Has anyone got a clue about this ?

Regards
Adrien BUSTANY