The phoneGetID function returns a device identifier for the given device class associated with the specified phone device.
LONG phoneGetID(
HPHONE hPhone,
LPVARSTRING lpDeviceID,
LPCSTR lpszDeviceClass
);
Returns zero if the request succeeds or a negative error number if an error occurs. Possible return values are:
PHONEERR_INVALPHONEHANDLE, PHONEERR_NOMEM, PHONEERR_INVALPOINTER, PHONEERR_RESOURCEUNAVAIL, PHONEERR_INVALDEVICECLASS, PHONEERR_UNINITIALIZED, PHONEERR_OPERATIONFAILED, PHONEERR_STRUCTURETOOSMALL, PHONEERR_OPERATIONUNAVAIL.
The phoneGetID function can be used to retrieve a phone device identifier given a phone handle. It can also be used to obtain the device identifier of the media device (for device classes such as COM, wave, MIDI, phone, line, or NDIS) associated with the opened phone device. The names of these device class are not case sensitive. This identifier can then be used with the appropriate media API to select the corresponding device.
See Device Classes in TAPI for device class names.
A vendor that defines a device-specific media mode also needs to define the corresponding device-specific (proprietary) API to manage devices of the media mode. To avoid collisions on device class names assigned independently by different vendors, a vendor should select a name that uniquely identifies both the vendor and, following it, the media type. For example: "intel/video".
Version: Use TAPI version 1.4 and later.
Header: Declared in tapi.h.
Import Library: Link with tapi32.lib.
TAPI Reference Overview, Supplementary Phone Services Functions, VARSTRING