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PHONEINITIALIZEEXPARAMS structure (tapi.h)

  • Article

The PHONEINITIALIZEEXPARAMS structure contains parameters used to establish the association between an application and TAPI; for example, the application's selected event notification mechanism. The phoneInitializeEx function uses this structure.

Syntax

typedef struct phoneinitializeexparams_tag {
  DWORD dwTotalSize;
  DWORD dwNeededSize;
  DWORD dwUsedSize;
  DWORD dwOptions;
  union {
    HANDLE hEvent;
    HANDLE hCompletionPort;
  } Handles;
  DWORD dwCompletionKey;
} PHONEINITIALIZEEXPARAMS, *LPPHONEINITIALIZEEXPARAMS;

Members

dwTotalSize

Total size allocated to this data structure, in bytes.

dwNeededSize

Size for this data structure that is needed to hold all the returned information, in bytes.

dwUsedSize

Size of the portion of this data structure that contains useful information, in bytes.

dwOptions

One of the PHONEINITIALIZEEXOPTION_ Constants. Specifies the event notification mechanism the application desires to use.

Handles

Handles.hEvent

If dwOptions specifies PHONEINITIALIZEEXOPTION_USEEVENT, TAPI returns the event handle in this member.

Handles.hCompletionPort

If dwOptions specifies PHONEINITIALIZEEXOPTION_USECOMPLETIONPORT, the application must specify in this member the handle of an existing completion port opened using CreateIoCompletionPort.

dwCompletionKey

If dwOptions specifies PHONEINITIALIZEEXOPTION_USECOMPLETIONPORT, the application must specify in this field a value that is returned through the lpCompletionKey parameter of GetQueuedCompletionStatus to identify the completion message as a telephony message.

Remarks

See phoneInitializeEx for further information on these options.

Requirements

Requirement Value
Header tapi.h

See also

phoneInitializeEx