Barcode and GTIN Codes

My name is Leandro and I live in Brazil. In the moment I am needing some literature regarding Bar Codes’s use. I need to know if it is possible scan a bar code or a GTIN Codes in a sales order and like this to determine an item and their configurations (Configuration, Size and color).
I need to know also as it is the use of Scaners in Microsoft Dynamics AX to work in Management Inventory Breakdown of wharehouses locations. Is it for AX Mobile or is the access for Terminal Server?
I thank the help and excuse bad English!