The lineGetAppPriority function allows an application to determine whether or not it is in the handoff priority list for a particular media mode or Assisted Telephony request mode and, if so, its position in the priority list.
LONG lineGetAppPriority(
LPCSTR lpszAppFilename,
DWORD dwMediaMode,
LPLINEEXTENSIONID const lpExtensionID,
DWORD dwRequestMode,
LPVARSTRING lpExtensionName,
LPDWORD lpdwPriority
);
In API versions earlier than 2.0, the value –1 (0xFFFFFFFF) is returned if the application has the line open for the specified media mode or has registered for the specified requests, but the application is not in the stored priority list (that is, it is in the temporary priority list only). In API version 2.0 or later, the value 0 is returned to indicate this condition.
Otherwise, the value indicates the application's position in the list (with 1 being highest priority, and increasing values indicating decreasing priority).
Returns zero if the request succeeds or a negative error number if an error occurs. Possible return values are:
LINEERR_INIFILECORRUPT, LINEERR_INVALREQUESTMODE, LINEERR_INVALAPPNAME, LINEERR_NOMEM, LINEERR_INVALMEDIAMODE, LINEERR_OPERATIONFAILED, LINEERR_INVALPOINTER, LINEERR_STRUCTURETOOSMALL.
If LINEERR_INVALMEDIAMODE is returned, the value specified in dwMediaMode is not zero, not a valid extended media mode, and not a LINEMEDIAMODE_ constant, or more than one bit is on in the parameter value.
Also, long filenames are now permitted for lpszAppFilename; 8.3 format names are acceptable, but no longer required.
Although this is a new function that older applications would not be expected to call, for backward compatibility they should not be prevented from doing so; the function works the same way for all applications.
Version: Use TAPI version 1.4 and later.
Header: Declared in tapi.h.
Import Library: Link with tapi32.lib.
TAPI Reference Overview, Supplementary Line Services Functions, LINEEXTENSIONID, VARSTRING