Enum Update
Type of modification and the action which caused the modification. These are defined as a bit mask to make it easy to specify which notifications are wanted. One bit is set from each of SC_MOD_* and SC_PERFORMED_*. (Scintilla feature SC_UPDATE_)
[Flags]
public enum Update
  Fields
CONTENT = 1H_SCROLL = 8NONE = 0SELECTION = 2V_SCROLL = 4