phoneSetLamp

The phoneSetLamp function causes the specified lamp to be lit on the specified open phone device in the specified lamp mode.

LONG phoneSetLamp(
  HPHONE hPhone,         
  DWORD dwButtonLampID,  
  DWORD dwLampMode       
);
 

Parameters

hPhone

A handle to the open phone device. The application must be the owner of the phone.

dwButtonLampID

The button whose lamp is to be lit.

dwLampMode

How the lamp is to be lit. The dwLampMode parameter can have only a single bit set. This parameter uses the following PHONELAMPMODE_ constants:

PHONELAMPMODE_BROKENFLUTTER

Broken flutter is the superposition of flash and flutter.

PHONELAMPMODE_FLASH

Flash means slow on and off.

PHONELAMPMODE_FLUTTER

Flutter means fast on and off.

PHONELAMPMODE_OFF

The lamp is off.

PHONELAMPMODE_STEADY

The lamp is continuously lit.

PHONELAMPMODE_WINK

The lamp is winking.

PHONELAMPMODE_DUMMY

This value is used to describe a button/lamp position that has no corresponding lamp.

Return Values

Returns a positive request identifier if the function is completed asynchronously or a negative error number if an error occurs. The dwParam2 parameter of the corresponding PHONE_REPLY message is zero if the function succeeds or it is a negative error number if an error occurs. Possible return values are:

PHONEERR_INVALPHONEHANDLE, PHONEERR_OPERATIONUNAVAIL, PHONEERR_NOTOWNER, PHONEERR_NOMEM, PHONEERR_INVALBUTTONLAMPID, PHONEERR_RESOURCEUNAVAIL, PHONEERR_INVALPHONESTATE, PHONEERR_OPERATIONFAILED, PHONEERR_INVALLAMPMODE, PHONEERR_UNINITIALIZED.

QuickInfo

  Version: Use TAPI version 1.4 and later.
  Header: Declared in tapi.h.
  Import Library: Link with tapi32.lib.

See Also

TAPI Reference Overview, Supplementary Phone Services Functions, PHONE_REPLY