phoneGetButtonInfo

The phoneGetButtonInfo function returns information about the specified button.

LONG phoneGetButtonInfo(

HPHONE hPhone,
DWORD dwButtonLampID,
LPPHONEBUTTONINFO lpButtonInfo
);

Parameters
hPhone

A handle to the open phone device.

dwButtonLampID

A button on the phone device.

lpButtonInfo

A pointer to a variably sized structure of type PHONEBUTTONINFO. This data structure describes the mode, the function, and provides additional descriptive text corresponding to the button.

Return Values
Returns zero if the request is successful or a negative error number if an error has occurred. Possible return values are:

PHONEERR_INVALPHONEHANDLE, PHONEERR_NOMEM, PHONEERR_INVALBUTTONLAMPID, PHONEERR_RESOURCEUNAVAIL, PHONEERR_INVALPOINTER, PHONEERR_OPERATIONFAILED, PHONEERR_INVALPHONESTATE, PHONEERR_STRUCTURETOOSMALL, PHONEERR_OPERATIONUNAVAIL, PHONEERR_UNINITIALIZED.