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lineGetMessage (Compact 2013)

  • Artigo

3/26/2014

This function returns the next TAPI message that is queued for delivery to an application that is using the Event Handle notification mechanism. For more information about the Event Handle notification mechanism, see lineInitializeEx.

Syntax

LONG WINAPI lineGetMessage(
  HLINEAPP hLineApp,
  LPLINEMESSAGE lpMessage,
  DWORD dwTimeout
);

Parameters

  • hLineApp
    The handle returned by the lineInitializeEx function. The application must have set the LINEINITIALIZEEXOPTION_USEEVENT option in the dwOptions member of the LINEINITIALIZEEXPARAMS structure.
  • lpMessage
    Pointer to a LINEMESSAGE structure. Upon successful return from this function, the structure contains the next message that had been queued for delivery to the application.
  • dwTimeout
    The time-out interval, in milliseconds. The function returns if the interval elapses, even if no message can be returned. If dwTimeout is zero, the function checks for a queued message and returns immediately. If dwTimeout is INFINITE, the function's time-out interval never elapses.

Return Value

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

LINEERR_INVALAPPHANDLE

Invalid handle

LINEERR_OPERATIONFAILED

No message could be fetched from the queue.

LINEERR_INVALPOINTER

Invalid pointer

LINEERR_NOMEM

No memory available

Remarks

If the lineGetMessage function has been called with a non-zero time-out and the application calls the lineShutdown function on another thread, lineGetMessage returns immediately with LINEERR_INVALAPPHANDLE.

If the time-out expires, or was zero, and no message could be fetched from the queue, the function returns with the error LINEERR_OPERATIONFAILED.

Requirements

Header

tapi.h

Library

TAPI32.dll

See Also

Reference

TAPI Line Device Functions
lineInitializeEx
lineShutdown
LINEINITIALIZEEXPARAMS
LINEMESSAGE