This is the first TAPI function that must be used to initialize TAPI. The lpdwAPIVersion parameter must be set to at least 0x00020000. This function should be followed by a lineNegotiateAPIVersion.

LONG
WINAPI
lineInitializeEx(
LPHLINEAPP lphLineApp, 
HINSTANCE hInstance, 
LINECALLBACK lpfnCallback, 
LPCSTR lpszFriendlyAppName, 
LPDWORD lpdwNumDevs, 
LPDWORD lpdwAPIVersion, 
LPLINEINITIALIZEEXPARAMS lpLineInitializeExParams 
);