how replicate a new field from Stock Stock Management form to Stock movement

[mihaiww]

Hi

I put a new field on

Stock:Stock Management Add a product form and i want to save it in a ps_stock_mvt table when i push the button "add to stock"

I tried to found all classes and controllers for stock module but realy i don't understand the prestashop concept.

Please everyone can tell me how

Many thanks in advance