Hi Guru,
I dont know the exact way.But you may try this
WTPart workingCopy;
WTPart part = WTPart.newWTPart("myPartNumber", "MyPartName");
part.setContainer(c.getContainer());
PersistenceHelper.
manager.save(part);
WTPart childPart = WTPart.newWTPart("myChildPartNumber", "MyChildPartName");
childPart.setContainer(c.getContainer());
PersistenceHelper.
manager.save(childPart);
workingCopy = (WTPart)WorkInProgressHelper. WTPartUsageLink link = WTPartUsageLink.newWTPartUsageLink(workingCopy, (WTPartMaster) childPart.getMaster()); Persistable per2 = PersistenceHelper. WorkInProgressHelper.