| Platform SDK: TAPI | 
The ADDRESS_STATE enum is used by the ITAddress::get_State method to check the address state.
typedef enum ADDRESS_STATE
{
  AS_INSERVICE,
  AS_OUTOFSERVICE
} ADDRESS_STATE;
  Windows NT/2000: Requires Windows 2000.
  Version: Requires TAPI 3.0 or later.
  Header: Declared in Tapi3.h.