TSPI_phoneOpen

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Windows Embedded CE 6.0 R3

4/8/2010

This function opens the phone device whose device identifier is given, returning the service provider's opaque handle for the device and retaining TAPI's opaque handle for the device for use in subsequent calls to the PHONEEVENT procedure.

Syntax

LONG TSPIAPI TSPI_phoneOpen(
  DWORD dwDeviceID, 
  HTAPIPHONE htPhone, 
  LPHDRVPHONE lphdPhone,  
  DWORD dwTSPIVersion, 
  PHONEEVENT lpfnEventProc
);

Parameters

• dwDeviceID
  Phone device to be opened.

• htPhone
  TAPI opaque handle for the phone device to be used in subsequent calls to the PHONEEVENT callback procedure to identify the device.

• lphdPhone
  Pointer to a HDRVPHONE where the service provider writes its handle for the phone device to be used by TAPI in subsequent calls to identify the device.

• dwTSPIVersion
  TSPI version negotiated through the TSPI_phoneNegotiateTSPIVersion function, under which the service provider can operate.

• lpfnEventProc
  Pointer to the PHONEEVENT callback procedure supplied by TAPI that the service provider calls to report subsequent events on the phone.

Return Value

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

Remarks

Opening a phone entitles TAPI to make further requests on the phone. The phone becomes active in the sense that the service provider can report asynchronous events such as hookswitch changes or button presses. The service provider reserves whatever nonsharable resources are required to manage the phone. For example, opening a phone accessed through a COM port and modem should result in opening the COM port, making it no longer available for use by other applications.

If the function succeeds, both TAPI and the service provider become committed to operating under the specified interface version number for this open device. Subsequent operations and events identified using the exchanged opaque phone handles conform to that interface version. This commitment and the validity of the handles remain in effect until TAPI closes the phone using the TSPI_phoneClose function or until the service provider reports the PHONE_CLOSE event. If the function is not successful, no such commitment is made and the handles are not valid.

Requirements

See Also

Reference

PHONEEVENT
TSPI_phoneClose
TSPI_phoneNegotiateTSPIVersion