function allows an application to set its priority in the handoff priority
list for a particular media mode or Assisted Telephony request mode or to remove
itself from the priority list.
| LPCSTR lpszAppFilename,
| DWORD dwMediaMode,
| LPLINEEXTENSIONID const lpExtensionID,
| DWORD dwRequestMode,
| LPCSTR lpszExtensionName,
| DWORD dwPriority
A pointer to a string containing the application executable module filename
(without directory information). In API versions 0x00020000 and greater, the
parameter can specify a filename in either long or 8.3 filename format.
The media mode for which the priority of the application is to be set. The
value may be one of the LINEMEDIAMODE_ constants; only a single bit may be on. The
value 0 should be used to set the application priority for Assisted Telephony
A pointer to structure of type LINEEXTENSIONID
. This parameter is ignored.
If the dwMediaMode
parameter is 0, this parameter specifies the Assisted Telephony request mode
for which priority is to be set. It must be either LINEREQUESTMODE_MAKECALL or
LINEREQUESTMODE_MEDIACALL. This parameter is ignored if dwMediaMode
This parameter is ignored.
The new priority for the application. If the value 0 is passed, the
application is removed from the priority list for the specified media or request mode (if
it was already not present, no error is generated). If the value 1 is passed,
the application is inserted as the highest-priority application for the media
or request mode (and removed from a lower-priority position, if it was already
in the list). Any other value generates an error.
Returns zero if the request is successful or a negative error number if an
error has occurred. Possible return values are:
LINEERR_INIFILECORRUPT, LINEERR_INVALREQUESTMODE, LINEERR_INVALAPPNAME,
LINEERR_NOMEM, LINEERR_INVALMEDIAMODE, LINEERR_OPERATIONFAILED, LINEERR_INVALPARAM,
If LINEERR_INVALMEDIAMODE is returned, the value specified in dwMediaMode
is not 0 and not a LINEMEDIAMODE_ constant, or more than one bit is on in the
This function updates to stored priority list. If the telephony system is
initialized, it also sets the current, active priorities for applications then
running; the new priority will be used on the next incoming call or lineHandoff
based on media mode.
Although this is a new function which older applications would not be expected
to call, for backward compatibility, they should not be prevented from doing
so. The function will work the same way for all applications.
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