what is the code for accessing Parent and Child SharePoint Sites in InfoPath form 2007

[maheshdola]

I am new to Infopath form and I am trying to implement coding in
Infopath form 2007 in which i have to access the sharepoint lists
which are belonging to current site published and its parent site and
Child site of sharepoint.
Can some one help me in sending the code for accessing the sharepoint
lists residing in different sites of same site collection and moreover
the coding should be dynamic, we shouldn't access the lists by
providing the URL of sharepoint sites...

Thanks in advance

mahesh