function picks up a call alerting at the specified destination address and
returns a call handle for the picked-up call. If invoked with NULL for the lpszDestAddress
parameter, a group pickup is performed. If required by the device, lpszGroupID
specifies the group ID to which the alerting station belongs.
| HLINE hLine,
| DWORD dwAddressID,
| LPHCALL lphCall,
| LPCSTR lpszDestAddress,
| LPCSTR lpszGroupID
A handle to the open line device on which a call is to be picked up.
The address on hLine
at which the pickup is to be originated.
A pointer to a memory location where the handle to the picked up call will be
returned. The application will be the initial sole owner of the call.
A pointer to a NULL-terminated character buffer that contains the address
whose call is to be picked up. The address is in standard dialable address format.
A pointer to a NULL-terminated character buffer containing the group ID to
which the alerting station belongs. This parameter is required on some switches to
pick up calls outside of the current pickup group.
Note that lpszGroupID
can be specified by itself with a NULL pointer for lpszDestAddress
. Alternatively, lpszGroupID
can be specified in addition to lpszDestAddress
, if required by the device.
Returns a positive request ID if the function will be completed
asynchronously, or a negative error number if an error has occurred. The dwParam2
parameter of the corresponding LINE_REPLY
message is zero if the function is successful or it is a negative error
number if an error has occurred. Possible return values are:
LINEERR_INVALADDRESS, LINEERR_NOMEM, LINEERR_INVALADDRESSID,
LINEERR_OPERATIONUNAVAIL, LINEERR_INVALGROUPID, LINEERR_OPERATIONFAILED,
LINEERR_INVALLINEHANDLE, LINEERR_RESOURCEUNAVAIL, LINEERR_INVALPOINTER, LINEERR_UNINITIALIZED.
When a call has been picked up successfully, the application is notified by
message about call state changes. The LINECALLINFO
structure supplies information about the call that was picked up. It will
list the reason for the call as pickup
. This structure is available using lineGetCallInfo
If LINEADDRCAPFLAGS_PICKUPCALLWAIT is TRUE, linePickup
can be used to pick up a call for which the user has audibly detected the
call-waiting signal but for which the provider is unable to perform the detection.
This gives the user a mechanism to "answer" a waiting call even though the
service provider was unable to detect the call-waiting signal. Both lpszDestAddress
pointer parameters must be NULL to pick up a call-waiting call. The linePickup
function will create a new call handle for the waiting call and pass that
handle to the user. dwAddressID
will most often be zero (particularly in single-line residential cases).
has been used to pick up the second call, lineSwapHold
can be used to toggle between them. The lineDrop
function can be used to drop one (and toggle to the other), and so forth. If
the user wants to drop the current call and pick up the second call, they
should call lineDrop
when they get the call-waiting beep, wait for the second call to ring, and
then call lineAnswer
on the new call handle. The LINEADDRFEATURE_PICKUP flag in the dwAddressFeatures
field in LINEADDRESSSTATUS
indicates when pickup is actually possible.
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