added Remove(HWND); removed unused wParam parameter from SendTooltipMessage

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39027 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/tooltip.h

@@ -45,6 +45,9 @@ public:
     // add a window to the tooltip control
     void Add(WXHWND hwnd);
 
+    // remove any tooltip from the window
+    static void Remove(WXHWND hwnd);
+
 private:
     // the one and only one tooltip control we use - never access it directly
     // but use GetToolTipCtrl() which will create it when needed