View source for CN BEGINEDIT

The container control sends the WM_CONTROL (in Container Controls) message with the CN_BEGINEDIT notification code to its owner whenever container text is about to be edited.
==Syntax==
<PRE>
param1
     USHORT        id            /*  Container control ID. */
     USHORT        CN_BEGINEDIT  /*  Notification code. */

param2
     PCNREDITDATA  pCnrEditData  /*  Pointer to the CNREDITDATA structure. */
</PRE>

==Parameters==
;id (USHORT)
:Container control ID. 

;CN_BEGINEDIT (USHORT)
:Notification code. 

;pCnrEditData (PCNREDITDATA)
:Pointer to the CNREDITDATA structure. 

==Returns==
;ulReserved (ULONG)
:Reserved value, should be 0.

==Remarks==
The CN_BEGINEDIT notification code is sent when direct editing of container text begins.

'''Warning:''' Once your application receives the CN_BEGINEDIT notification code, it must not send any messages to the container until it receives the CN_ENDEDIT notification code, which indicates that direct editing of container text has ended. If any messages are sent to the container before your application receives the CN_ENDEDIT notification code, the results of direct editing are unpredictable. 

==Default Processing==

The default window procedure does not expect to receive this notification code and therefore takes no action on it other than to return 0.

[[Category:Messages]]