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def OnAbout(self, event):
bcur = wx.BeginBusyCursor()
wx.FileSystem.AddHandler(wx.MemoryFSHandler)
wx.MemoryFSHandler.AddFile("logo.pcx", wx.Bitmap("logo.pcx", wx.BITMAP_TYPE_PCX))
wx.MemoryFSHandler.AddFile("about.htm",
"<html><body>About: "
"<img src=\"memory:logo.pcx\"></body></html>")
dlg = wx.Dialog(self, -1, _("About"))
topsizer = wx.BoxSizer(wx.VERTICAL)
html = wx.html.HtmlWindow(dlg, size=wx.Size(380, 160), style=wx.HW_SCROLLBAR_NEVER)
html.SetBorders(0)
html.LoadPage("memory:about.htm")
html.SetSize(html.GetInternalRepresentation().GetWidth(),
html.GetInternalRepresentation().GetHeight())
topsizer.Add(html, 1, wx.ALL, 10)
topsizer.Add(wx.StaticLine(dlg, -1), 0, wx.EXPAND | wx.LEFT | wx.RIGHT, 10)
topsizer.Add(wx.Button(dlg, wx.ID_OK, "Ok"),
0, wx.ALL | wx.ALIGN_RIGHT, 15)
dlg.SetAutoLayout(True)
dlg.SetSizer(topsizer)
topsizer.Fit(dlg)
dlg.Centre()
dlg.ShowModal()
wx.MemoryFSHandler.RemoveFile("logo.pcx")
wx.MemoryFSHandler.RemoveFile("about.htm")
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