EN_STOPNOUNDO notification code
Notifies a rich edit control's parent window that an action occurred for which the control cannot allocate enough memory to maintain the undo state. A rich edit control sends this notification code in the form of a WM_NOTIFY message.
EN_STOPNOUNDO
lpnmhdr = (LPNMHDR) lParam;
Parameters
-
lParam
-
An NMHDR structure.
Return value
Return zero to continue the Undo operation.
Return a nonzero value to stop the Undo operation.
Remarks
The parent window will always get a WM_NOTIFY message for this event, it does not require a notification mask sent with EM_SETEVENTMASK.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2003 [desktop apps only] |
| Header |
|