Tk has come a long way since the 8.5 release.  Tk now looks native.  See <a href="http:&#x2F;&#x2F;www.tkdocs.com&#x2F;tutorial&#x2F;index.html" rel="nofollow">http:&#x2F;&#x2F;www.tkdocs.com&#x2F;tutorial&#x2F;index.html</a> for an excellent tutorial.