OLE event [Revelation On-Line Wiki]

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====== OLE event ======


 
==== Applies To ====
 
OLE objects
 
==== Description ====
 
The OLE event is generated for each message generated by an OLE object that is requested using [[qualify_event_message|QUALIFY_EVENT]].

Note:  The event qualifier ALL_OLES sends all OLE messages to the specified event handler.  To determine which events are being generated by an OLE control, examine the EventName parameter after using the ALL_OLES qualifier to handle all OLE events.

Note:  The event qualifier ALL_WINMSGS sends all Windows messages to the OLE object's [[winmsg_event|WINMSG]] event handler.  Use the ALL_WINSMSGS event handler to process Windows messages sent to OLE objects.
 
==== Syntax ====
 
//bForward// = **OLE**(//CtrlEntID, CtrlClassID, hWnd, Message, wParam, lParam//)
 
==== Parameters ====
 
OLE events send the following parameters:

^Parameter^Description^
|EventName|The name of the OLE event|
|Param1...Param10|Up to 10 parameters, separated by commas.|

Note:  Special Event Qualifier parameters for OLE events that can be optionally passed.  These are:

^Param^Usage^
|1|Modify Flag.  Same as for other events.  0 = clear event; 1 = set event|
|2|Event Qualifier.  Same as for other events.  However, this is optional if param<3> is supplied.  Also for OLE events, the arg count prefix is optional and is ignored if supplied.|
|3|Event Name.  Overrides the event name sent to [[send_event|Send_Event()]].|
|4|Synchronous flag.  0 = event is posted to the Windows message queue to be processed at a later time.  1 = event is fired immediately.|
|5|Suppress Name flag.  1 = Do not pass OLE event name to event handler.|
|6|Pass DispID flag.  1 = Pass OLE dispid to event handler.|
|7|Pass single parameters.  0 = Pass OLE event parameters as a single argument, delimited by field marks.|

 
==== See Also ====
 
[[qualify_event_message|QUALIFY_EVENT message]], [[catching_mouse_events_in_a_window|Catching Mouse Events in a Form]]

==== Example ====

Directing Windows Messages to a WINMSG Event handler

<code>
/* direct all Windows messages to the WINMSG event in the OLE control called HTML. */
OleEvent = 'ALL_WINMSGS'
x=Send_Message(@WINDOW:'.HTML', 'QUALIFY_EVENT', OleEvent, 1)
</code>

Directing OLE Messages to an OLE Event Handler

<code>
/* direct all OLE messages to the OLE event in the OLE control called HTML.
Fire the event immediately.
Send the parameters in a single field mark delimited variable. */

Qualifier ='' 
Qualifier<1> = 1
Qualifier<4> = 1 ; * synch
Qualifier<7> = 0 ; * single param
OleEvent = 'ALL_OLES'
x=Send_Message(@WINDOW:'.HTML', 'QUALIFY_EVENT', OleEvent, Qualifier)
</code>