phoneGetID

The phoneGetID function returns a device ID for the given device class associated with the specified phone device.

LONG phoneGetID(

HPHONE hPhone,
LPVARSTRING lpDeviceID,
LPCSTR lpszDeviceClass
);

Parameters
hPhone

A handle to an open phone device.

lpDeviceID

A pointer to a data structure of type VARSTRING where the device ID is returned. Upon successful completion of the request, this location is filled with the device ID. The format of the returned information depends on the method used by the device class (API) for naming devices.

lpszDeviceClass

A pointer to a NULL-terminated string that specifies the device class of the device whose ID is requested. Valid device class strings are those used in the SYSTEM.INI section to identify device classes.

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_INVALPOINTER, PHONEERR_RESOURCEUNAVAIL, PHONEERR_INVALDEVICECLASS, PHONEERR_UNINITIALIZED, PHONEERR_OPERATIONFAILED, PHONEERR_STRUCTURETOOSMALL, PHONEERR_OPERATIONUNAVAIL.

Remarks
The phoneGetID function can be used to retrieve a phone device ID given a phone handle. It can also be used to obtain the device ID 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 ID 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".