When openvpn signnal "CONNECTED" event, it did not already connecetd , and tun deivice is not created in 4-5seconds

Now, I am creating a openvpn client using the API on win platform.
I need to do something when I get the sinal of "CONENECTED" which means the vpn network is ok.

The issue is now, when I receiver the ”CONNECTED” event, the tun network device did not created finished, it takes 4-5 seoncds after get "CONNECED" event ,then the tun decice create and network is ok.

Could you help me if there any event or how can I know the network is ready ?
Can you help to fix the issue after the "CONNECTED" event signaled, it takes 4-5 seconds to finish create the tun device ?
The related of the code to signal the "CONNECTED " event is bellow:
==== in tuncli.hpp
virtual void tun_start(const OptionList& opt, TransportClient& transcli, CryptoDCSetting&) overide
{
...................
if(!dhcp_capture)
parent.tun_connected(); //signal that we are connected
}

===
thanks very much!
BR,
wsktree

Start in tuncli.hpp at tun_start(), especially the parent.tun_connected() signal and the dhcp_capture condition. Investigate the event ordering on Windows and determine when the TUN device is actually ready after CONNECTED. Done means the API exposes a reliable readiness signal or otherwise documents how callers can detect network readiness.