Changing directory calling a target

[Pa...@ca.ibm.com]

Hello, 

I'm new to Ant, so please excuse me for this basic question.

I have a target A that calls a target B (A and B are in the same file),
 and whereas the target A executes into the directory FOO, 
I'd like the target B to be executed into the directory BAR.

I tried to override the basedir (with the value BAR), after setting the 
inheritAll property to false, but the overriding is ignored.

How can I do that? I got something working putting the target B
into another file, but I'd like to avoid using this solution which I 
found very ugly.

        Thank you

                PaScaL