FCN1 control character set

Hi Experts

I am working on SAP Scripts to print EAN128 barcode with following information

Batch Number

Material Number

Quantity

Unit of Measure

Source Storage bin number.

According to user requirement, they want the barcode with Application Identifiers(AI) and with FNC1 Control characters....

Can anyone has idea on How to add FNC1 control characters and AI characters in between those above fields.

Any simple information is also appreciated.