TSPI_phoneGetHookSwitch (Windows Embedded CE 6.0)

1/6/2010

This function returns the current hookswitch mode of the specified open phone device.

Syntax

LONG TSPIAPI TSPI_phoneGetHookSwitch(
  HDRVPHONE hdPhone, 
  LPDWORD lpdwHookSwitchDevs 
);

hdPhone
Service provider's opaque handle to the phone whose hookswitch mode is to be retrieved.

lpdwHookSwitchDevs
Pointer to a DWORD-sized location into which the service provider writes the mode of the phone's hookswitch devices. This parameter uses one of the PHONEHOOKSWITCHDEV constants. If a bit position is FALSE, the corresponding hookswitch device is onhook. If TRUE, the microphone and/or speaker part of the corresponding hookswitch device is offhook. To find out whether microphone and/or speaker are enabled, TAPI can use the TSPI_phoneGetStatusfunction.

Returns zero if the function succeeds, or an error number if an error occurs. The following table shows the return values for this method.

Value	Description
PHONEERR_INVALPHONEHANDLE	The handle to the phone is invalid.
PHONEERR_RESOURCEUNAVAIL	The resource is unavailable.
PHONEERR_INVALPHONESTATE	The phone state is invalid.
PHONEERR_OPERATIONFAILED	The operation failed.
PHONEERR_NOMEM	Not enough memory is available.
PHONEERR_OPERATIONUNAVAIL	The operation is unavailable.

After the hookswitch state of a device changes, and if hookswitch monitoring is enabled, TAPI is sent a PHONE_STATE message.