made Add() public so that it could be called for addition HWNDs making part of the same logical wxWindow from other classes

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32441 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/tooltip.h

@@ -37,6 +37,9 @@ public:
     // should be called in responde to WM_MOUSEMOVE
     void RelayEvent(WXMSG *msg);
 
+    // add a window to the tooltip control
+    void Add(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
@@ -48,9 +51,6 @@ private:
     // remove this tooltip from the tooltip control
     void Remove();
 
-    // add a window to the tooltip control
-    void Add(WXHWND hwnd);
-
     wxString  m_text;           // tooltip text
     wxWindow *m_window;         // window we're associated with