How to set tooltips for wx.TreeListCtrl and wx.TreeListCtrl

I search the mailing list and find out how to set tooltip for wx.TreeCtrl, but it doesn't work for wx.TreeListCtrl.
    An example is listed below. OnTreeTooltip() is never been called.
Is there any way to set tooltips for wx.TreeListCtrl items?
    Any help would be appreciated!

···

##=======================================================
import wx
from wx.gizmos import TreeListCtrl

class MyApp(wx.App):
    def OnInit(self):
        frame = wx.Frame(None, -1, "TreeCtrl Tooltips")

        self.tree = TreeListCtrl(frame, -1)
        self.tree.AddColumn('main')
        root = self.tree.AddRoot("r00t")

        c1 = self.tree.AppendItem(root, "Topic 1")
        c1a = self.tree.AppendItem(c1, "Item 1")
        c2 = self.tree.AppendItem(root, "Topic 2")
        c3 = self.tree.AppendItem(root, "Topic 3")
        c3a = self.tree.AppendItem(c3, "Item 1")
        c3b = self.tree.AppendItem(c3, "Item 2")
        c3c = self.tree.AppendItem(c3, "Item 3")
        c3d = self.tree.AppendItem(c3, "Item 4")
            self.tree.Expand(c1)
        self.tree.Expand(c3)
        self.tree.SelectItem(c1)

        frame.Show(True)
        self.SetTopWindow(frame)
                self.tree.Bind(wx.EVT_TREE_ITEM_GETTOOLTIP,self.OnTreeTooltip)

        return True

    def OnTreeTooltip(self, event):
        print "Tool tip!" #debug
        itemtext = self.tree.GetItemText(event.GetItem())
        event.SetToolTip("This is a ToolTip for %s!" % itemtext)
        event.Skip()

app = MyApp(0)
app.MainLoop()
##=======================================================
  
Bruce Who
HuXuZhao@hotmail.com
2005-03-01

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