The phoneGetStatus function enables an application to query the specified open phone device for its overall status.
LONG phoneGetStatus(
HPHONE hPhone,
LPPHONESTATUS lpPhoneStatus
);
Returns zero if the request succeeds or a negative error number if an error occurs. Possible return values are:
PHONEERR_INVALPHONEHANDLE, PHONEERR_NOMEM, PHONEERR_INVALPOINTER, PHONEERR_RESOURCEUNAVAIL, PHONEERR_OPERATIONFAILED, PHONEERR_STRUCTURETOOSMALL, PHONEERR_OPERATIONUNAVAIL, PHONEERR_UNINITIALIZED.
An application can use this function to determine the current state of an open phone device. The status information describes information about the phone device's hookswitch devices, ringer, volume, display, and lamps.
Version: Use TAPI version 1.4 and later.
Header: Declared in tapi.h.
Import Library: Link with tapi32.lib.
TAPI Reference Overview, Supplementary Phone Services Functions, PHONESTATUS