ITPhone::get_HookSwitchState method (tapi3if.h)
The get_HookSwitchState method retrieves the current hookswitch state for a particular hookswitch device on the phone.
The application must call ITPhone::Open before invoking this method; otherwise, the invocation fails.
Syntax
HRESULT get_HookSwitchState(
[in] PHONE_HOOK_SWITCH_DEVICE HookSwitchDevice,
[out] PHONE_HOOK_SWITCH_STATE *pHookSwitchState
);
Parameters
[in] HookSwitchDevice
The PHONE_HOOK_SWITCH_DEVICE descriptor for the hookswitch type.
[out] pHookSwitchState
The PHONE_HOOK_SWITCH_STATE descriptor for the hookswitch status.
Return value
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Windows |
| Header | tapi3if.h (include Tapi3.h) |
| Library | Uuid.lib |
| DLL | Tapi3.dll |