This function retrieves the telephony capabilities of a particular address for a particular line. The capabilities are returned in the lineAddressCaps structure.

IP Office lines always have a single address.

LONG
WINAPI
lineGetAddressCaps(
HLINEAPP hLineApp, 
DWORD dwDeviceID, 
DWORD dwAddressID, 
DWORD dwAPIVersion, 
DWORD dwExtVersion, 
LPLINEADDRESSCAPS lpAddressCaps 
);