The LINECALLPRIVILEGE_ bit-flag constants describe the kinds of access rights
or privileges an application with a call handle may have to the corresponding
The application has no privileges to the call. The application's handle is
void and should not be used.
The application has monitor privileges to the call. These privileges allow the
application to monitor state changes and query information and status about
The application has owner privileges to the call. These privileges allow the
application to manipulate the call in ways that affect the state of the call.
No extensibility. All 32 bits are reserved.
When a call handle is first provided to an application or whenever call
privileges of that application are modified, the LINE_CALLSTATE
message is sent to the application. When an application hands off a call, and
if the receiving application does not already have a handle with owner
privileges, then this message informs the application about its new privileges to the
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