phoneGetID

  • 项目

This function returns a device identifier for the given device class associated with the specified phone device.

LONG WINAPI phoneGetID(
  HPHONE hPhone,
  LPVARSTRING lpDeviceID,
  LPCWSTR lpszDeviceClass 
);

Parameters

  • hPhone
    Handle to an open phone device.
  • lpDeviceID
    Pointer to a data structure of type VARSTRING where the device identifier is returned. Upon successful completion of the request, this location is filled with the device identifier. The format of the returned information depends on the method used by the device class (API) for naming devices.
  • lpszDeviceClass
    Pointer to a null-terminated string that specifies the device class of the device whose identifier is requested. The device class is dependent on the service provider.

Return Values

Returns zero if the request succeeds or a negative error number if an error occurs. The following table shows the return values for this function.

Value Description
PHONEERR_INVALPHONEHANDLE The handle to the open phone device is invalid.
PHONEERR_NOMEM Not enough memory is available.
PHONEERR_INVALPOINTER The pointer is invalid.
PHONEERR_RESOURCEUNAVAIL The resources are unavailable.
PHONEERR_INVALDEVICECLASS The device class is invalid.
PHONEERR_UNINITIALIZED A parameter is uninitialized.
PHONEERR_OPERATIONFAILED The operation failed.
PHONEERR_STRUCTURETOOSMALL The structure is too small.
PHONEERR_OPERATIONUNAVAIL The operation is unavailable.

Remarks

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 classes are not case sensitive. This identifier can then be used with the appropriate media API to select the corresponding device.

See TAPI Device Classes for device class names.

A vendor that defines a device-specific media type also needs to define the corresponding device-specific (proprietary) API to manage devices of the media type. 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".

Note   This function is for TAPI version 2.0 and later.

Requirements

OS Versions: Windows CE 3.0 and later.
Header: Tapi.h.
Link Library: Coredll.lib.

See Also

VARSTRING

 Last updated on Saturday, April 10, 2004

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