title: Is it possible to obtain and modify standard system context menu for textbox?
body: <p>I have a simple winform app with textbox.<br>
  I didnt assigned any context menu to text field and "it uses" standard one. I desire to add some new items to textbox's standard context menu. But I cant obtain it for modification, if be more clearly I didnt know how to obtain HMENU native object.<br>
  <code>ContextMenu</code> property of my textbox equals <code>null</code> so I suppose that menu appers within textbox defaul windProc routing. It there a way to get the default context menu or get a copy of it?  </p>
  
  <p>Thanks in advance!</p>