I am using the extended TAPI function lineRegister to register a GPRS radio on the network after powering the radio on using lineSetEquipmentState. The lineRegister function is returning successfully before the network is actually registered.
The asynchronous lineRegister function first returns a positive number indicating the function succeeded. I then wait for a LINE_REPLY callback from TAPI. The 'dwParam1' value matches the initial return value of lineRegister, indicating this is the asynchronous reply to my previous lineRegister call. The dwParam2 value is set to 0, which MSDN says indicates the function succeeded.
I then try to connect to the GPRS network but the connection fails. I have added code to call lineGetRegisterStatus in the LINE_REPLY for lineRegister, and I can confirm the radio is not yet registered. Is there any way to be notified when the network is successfully registered and usable? It seems broken to have to poll for network registration when there is an asynchronous API and notification system available.