There is actually an ant task named ‘ant’. It’s described in the manual, here is
a copy of the provided example
<ant antfile=”subproject/subbuild.xml” dir=”subproject” target=”compile”/>
Reference
1. http://ant.apache.org/manual/CoreTasks/ant.html
2. http://codefeed.com/tutorial/clover.html

References
1. http://buildbot.net/trac/wiki/RunningBuildbotOnWindows (buildbot on windows)

References
1. http://nantcontrib.sourceforge.net/release/0.85-rc3/help/tasks/svn-checkout.html (svn checkout)

References
1. http://svnbook.red-bean.com/en/1.0/svn-book.html#svn-ch-4-sect-6.1 (subversion manuals)

References
1. http://ant.apache.org/manual/CoreTasks/antcall.html (antcall tasks)
Specifics
1. http://marc.info/?l=ant-user&m=115166061526974&w=2 (C/C++ development using ant)
2. http://wiki.apache.org/ant/AntUtil (calling ant using -D references)

Tools
1. http://technet.microsoft.com/en-us/sysinternals/bb896649.aspx (Windows amazing tools)