ant target in maven.xml

Is it possible to call a target, defined in my own build.xml script ANT, in a goal Maven (in maven.xml)??
thank you for response

It's possible to write a Maven plugin to use an Ant target if that is what you are asking....

I don't know if I need to create a new plug-in...
I have a build.xml (ant script), and I just need to call, in my maven.xml, a target which is described in my ant file...
actually, I use the target "exec" to do this
(like "<exec executable="ant.bat" os="Windows 2000">
<arg line="-f"/>
<arg line="'mybuild.xml'"/>
<arg line="mytarget"/>"
I've got a pb with the "<ant>" target in maven...),
but, it create a new java process, and I don't want that! I want to execute my target ant in the same process as maven....
Have you got an idea to do that??
perhaps, a plugin is necessary... I don't know