Fires an event when the user is taking an action that would change a protected range of text in the RichTextBox control.
[Visual Basic] Overridable Protected Sub OnProtected( _ ByVal e As EventArgs _ ) [C#] protected virtual void OnProtected( EventArgs e ); [C++] protected: virtual void OnProtected( EventArgs* e ); [JScript] protected function OnProtected( e : EventArgs );
RichTextBox Class | RichTextBox Members | System.WinForms Namespace