lineGetNewCalls
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4/8/2010
This function returns call handles to calls on a specified line or address for which the application currently does not have handles. The application is granted monitor privilege to these calls.
Syntax
LONG WINAPI lineGetNewCalls(
HLINE hLine,
DWORD dwAddressID,
DWORD dwSelect,
LPLINECALLLIST lpCallList
);
Parameters
- hLine
Handle to an open line device.
- dwAddressID
Address on the given open line device. An address identifier is permanently associated with an address; the identifier remains constant across operating system upgrades.
- dwSelect
Selection of calls that are requested. This parameter uses one and only one of the LINECALLSELECT constants.
- lpCallList
Pointer to a variably sized data structure of type LINECALLLIST. Upon successful completion of the request, call handles to all selected calls are returned in this structure. Prior to calling lineGetNewCalls, the application should set the dwTotalSize member of this structure to indicate the amount of memory available to TAPI for returning information.
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_INVALADDRESSID |
The address identifier is invalid. |
LINEERR_OPERATIONFAILED |
The operation failed. |
LINEERR_INVALCALLSELECT |
The selection of calls are invalid. |
LINEERR_RESOURCEUNAVAIL |
The resources are invalid. |
LINEERR_INVALLINEHANDLE |
The handle to the open line device is invalid. |
LINEERR_STRUCTURETOOSMALL |
The structure is too small. |
LINEERR_INVALPOINTER |
The pointer is invalid. |
LINEERR_UNINITIALIZED |
A parameter is uninitialized. |
LINEERR_NOMEM |
Not enough memory is available. |
Remarks
An application can use lineGetNewCalls to obtain handles to calls for which it currently has no handles. The application can select the calls for which handles are to be returned by basing this selection on scope (calls on a specified line, or calls on a specified address). For example, an application can request call handles to all calls on a given address for which it currently has no handle. The application is always given monitor privilege to the new call handles. Also, when opening a line, an application uses this function to become aware of existing calls.
The application can invoke the lineGetCallInfo and lineGetCallStatus functions for each call in the list to determine the call's information and status, respectively. It can use the lineSetCallPrivilege function to change its privilege to owner.
Note
This function is for TAPI version 2.0 and later.
Requirements
| Header | tapi.h |
| Library | coredll.lib |
| Windows Embedded CE | Windows CE 1.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |