function enables an application to set the application-specific field of the
specified call's call-information record.
| HCALL hCall,
| DWORD dwAppSpecific
A handle to the call whose application-specific field needs to be set. The
application must be an owner of the call. The call state of hCall
can be any state.
The new content of the dwAppSpecific
field for the call's LINECALLINFO
structure. This value is not interpreted by the Telephony API.
Returns zero if the request is successful or a negative error number if an
error has occurred. Possible return values are:
LINEERR_INVALCALLHANDLE, LINEERR_RESOURCEUNAVAIL, LINEERR_NOMEM,
LINEERR_UNINITIALIZED, LINEERR_NOTOWNER, LINEERR_OPERATIONUNAVAIL, LINEERR_OPERATIONFAILED.
The application-specific field in the LINECALLINFO
data structure that exists for each call is not interpreted by the Telephony
API or any of its service providers. Its usage is entirely defined by the
applications. The field can be read from the LINECALLINFO
record returned by lineGetCallInfo
. However, lineSetAppSpecific
must be used to set the field so that changes become visible to other
applications. When this field is changed, all other applications with call handles are
sent a LINE_CALLINFO message with an indication that the dwAppSpecific
field has changed.
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