C # detects mouse movement messages

When there are other controls on the C # window, the window itself does not detect messages.
1, use WndProc, MouseMove not, such as

1 protected Override voidWndProc (refMessage m)2         {3             Switch(m.msg)4             {5                  CaseWm_mousemove:6Debug.Write (string. Format ("currentdate:{0}", DateTime.Now) +Environment.NewLine);7                      Break;8             }9             Base. WndProc (refm);Ten}

2. Using Prefiltermessage

1  Public Partial classForm1:form, IMessageFilter2 {3 //added in the constructor function4  PublicForm1 ()5 {6 InitializeComponent ();7Application.addmessagefilter ( This);8 9 }Ten  Public BOOLPrefiltermessage (refMessage msg) One { A      Const intWm_mousemove =0x200; -      if(Msg. MSG = =wm_mousemove) -      { the Testpopup (); -      } -      return false; - } +}

C # detects mouse movement messages