Header batch no copy to component batch in Process order

Hi,

I have following requirement...

we create process orders with COR1 in PP module.. then we assign the batch no to in the goods receipt tab as shown below..

Now when we save the Process order system has to automatically assign the same batch no to one of the component automatically as shown below..

What user exit or enhancement I can use for this..If anybody worked on this can you help me out...

Thanks

Kumar