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Use the lineGetOperatorStatus function to retrieve the lists of preferred and available operators. The preferred operator list is stored locally on the device and automatic registration iterates through this list when attempting to register. The available list shows which network operators are currently in range of the device. To obtain the current operator, use lineGetCurrentOperator.

LONG WINAPI lineGetOperatorStatus(
  HLINE hLine,


  • 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.
  • lpOperatorStatus
    Points to a variably sized data structure of type LINEOPERATORSTATUS. See the LINEOPERATOR structure for possible values. For more details, see TAPI Memory Allocation at Microsoft MSDN® Online.

Return Values

Returns zero if the function completes successfully, or a negative error number if an error occurs. The following are possible return values:



Prior to first calling lineGetOperatorStatus, the application should set the dwTotalSize member of the LINEOPERATORSTATUS structure passed as the lpOperatorStatus parameter to 0 (zero). This will return the size, in bytes, of memory needed to store the data returned by subsequently calling this function.

This function is synchronous. No LINE_REPLY message is sent and the application can use the contents of the parameter structures immediately after this function returns. Not implemented for CDMA.


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 | lineGetCurrentOperator | LINEOPERATOR | LINEOPERATORSTATUS

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