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 message in the form of a WM_NOTIFY message.
EN_STOPNOUNDO
wParam = (WPARAM) (UINT) uID;
lParam = (LPARAM) (NMHDR FAR *) lpNmHdr;
Returns zero to continue the action, nonzero to stop it.
Windows NT: Requires version 3.51 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in richedit.h.
Rich Edit Controls Overview, Rich Edit Notification Messages, NMHDR, WM_NOTIFY