Hello Sharonlz,
btw, forget about using fonts for a complex 2-D barcode like Datamatrix. For 1-D barcodes, fonts can be a solution.
There is a Datamatrix ECC200 implementation for SAPscript/SmartFOrms in standard SAP, but it is pretty recent and your system probably does not yet have it. Check out note
http://service.sap.com/sap/support/notes/2001392
Related notes 2029589 and 2029824
explain how to downport this to certain older releases.
And if you are using SAP Interactive Forms by Adobe (IFbA), this newer forms tool should support generating Datamatrix Barcodes out of the box.
Best regards,
Alex