Thanks debbie10t.
That starts a default connection (the one under \config\ as a service).
The only way I have found to see if the connection is up on windows clients is to use ipconfig, and I have been given a tip to rename the tun adapter to OpenVPN etc for clarity.
I thought for the sake of the community I would also document a few things I learnt about openvpn gui:
Openvpn seems to shop with openvpn-gui.exe - but there is a separate openvpn-gui.1.0.3.exe which has more options than the straight openvpn-gui.exe? (hide script windows etc etc).
However I could not get openvpn-gui.1.0.3.exe to work with the 64 bit version of OpenVPN - I could only get it to work with 32 bit version. I got Application Errors when trying to run openvpn-gui.1.0.3.exe from the 64 bit installation folder.
Finally creating a shortcut with target set to
"C:\Program Files (x86)\OpenVPN\bin\openvpn-gui-1.0.3.exe" --config_dir "C:\Program Files (x86)\OpenVPN\config\" --connect server.ovpn --show_balloon 0 --silent_connection 1 --show_script_window 0
Works really well. Run it as administrator and put in startup folder for auto connect at logon.
Hope this helps others.
-Al