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lineSetPreferredOperator

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Use the lineSetPreferredOperator function to set or delete a preferred operator. The preferred operator list is stored locally on the phone and automatic registration iterates through this list when attempting to register.

LONG WINAPI lineSetPreferredOperator(
  HLINE hLine,
  LPLINEOPERATOR lpOperator
);

Parameters

  • hLine
    The line device handle. The line device handle must have been previously obtained by a call to lineOpen with the proper TAPI device ID specified and a device-specific extension version successfully negotiated with lineNegotiateExtVersion. For more information about lineNegotiateExtVersion and lineOpen, see the TAPI Functions API Reference topics on MSDN.
  • lpOperator
    Points to a LINEOPERATOR structure that provides information about a preferred operator. If the dwIndex member is LINEOPERATOR_USEFIRSTAVAILABLEINDEX, write to first available location. If dwValidParams is LINEOPFORMAT_NONE and dwIndex is not LINEOPERATOR_USEFIRSTAVAILABLEINDEX, erase the operator entry at dwIndex.

Return Values

Returns a positive request identifier if the function is completed asynchronously, or a negative error number if an error occurs. The dwParam2 parameter of the corresponding LINE_REPLY message is zero if the function succeeds or it is a negative error number if an error occurs. The following are possible return values:

LINEERR_INVALLINEHANDLE
LINEERR_NOMEM
LINEERR_OPERATIONUNAVAIL
LINEERR_OPERATIONFAILED
LINEERR_RESOURCEUNAVAIL
LINEERR_INVALPOINTER
LINEERR_INVALPARAM
LINEERR_UNINITIALIZED

Remarks

This is a privileged function.

Not implemented for CDMA.

Note   For operator selection, use the numeric ID.

Requirements

Pocket PC: Pocket PC 2002 and later.
Smartphone: Smartphone 2002 and later.
OS Versions: Windows CE 3.0 and later.
Header: Extapi.h.
Library: Cellcore.lib.

See Also

Extended TAPI Functions | LINEOPERATOR

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