phoneGetStatusW function (tapi.h)

The phoneGetStatus function enables an application to query the specified open phone device for its overall status.

Syntax

LONG phoneGetStatusW(
  HPHONE        hPhone,
  LPPHONESTATUS lpPhoneStatus
);

Parameters

hPhone

Handle to the open phone device to be queried.

lpPhoneStatus

Pointer to a variably sized data structure of type PHONESTATUS, which is loaded with the returned information about the phone's status.

Return value

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.

Remarks

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.

Note

The tapi.h header defines phoneGetStatus as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

   
Target Platform Windows
Header tapi.h
Library Tapi32.lib
DLL Tapi32.dll

See also

PHONESTATUS

Supplementary Phone Service Functions

TAPI 2.2 Reference Overview