The LINEDEVSTATUSFLAGS_ bit-flag constants describe a collection of Boolean
line device status items.
Specifies whether the line is connected to TAPI. If TRUE, the line is
connected and TAPI is able to operate on the line device. If FALSE, the line is
disconnected and the application is unable to control the line device through TAPI.
Indicates whether the line has a message waiting. If TRUE, a message is
waiting; if FALSE, no message is waiting.
Indicates whether the line is in service. If TRUE, the line is in service; if
FALSE, the line is out of service.
Indicates whether the line is locked or unlocked. This bit is most often used
with line devices associated with cellular phones. Many cellular phones have a
security mechanism that requires the entry of a password to enable the phone to
place calls. This bit may be used to indicate to applications that the phone
is locked and cannot place calls until the password is entered on the user
interface of the phone so that the application can present an appropriate alert to
No extensibility. All 32 bits are reserved.
LINEDEVSTATUSFLAGS_ constants are used within the dwDevStatusFlags
field of the LINEDEVSTATUS
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