ITPhoneEvent::get_HookSwitchDevice method (tapi3if.h)

The get_HookSwitchDevice method returns a PHONE_HOOK_SWITCH_DEVICE value specifying the hookswitch device that changed state. This information is available only when the ITPhoneEvent::get_Event method returns PE_HOOKSWITCH.

Syntax

HRESULT get_HookSwitchDevice(
  [out] PHONE_HOOK_SWITCH_DEVICE *pDevice
);

Parameters

[out] pDevice

Pointer to the PHONE_HOOK_SWITCH_DEVICE descriptor of the type of device that has changed hookswitch state.

Return value

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Requirements

See also

ITPhoneEvent

ITPhoneEvent::get_Event