how to create a form to use two table data .

Hi All,

I have to create a form to use two tables like Item Ledger Entry and Warehouse Entry. but there are two fields above Item No. and lot No., and all the Fields from that two table are below. But condition is when i put data in above two fields i mean Item no and Lot no then all fields are retrieve automatically. so suggest me which type of form have to create and how, If any code need to write then please Explain.

Thanks in advanced