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..

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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..

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

Thanks

Kumar