>If foxbarcodeQR does not enaugh, the is a fine tool I am using called ActiveBarocde, which allows more settings like the dpi, precise size and the error-correction level. Only disadvantage is that it needs early binding to work without licensing hassle on client machines. Can be found here:
>https://www.activebarcode.com/
>Anothe tool which works fine is found at http://barcodetools.com/.
>The reason I am using the first one is because I got a develeoper license at a very special price and it fulfills all my needs.
>Best regards
>Thomas

For Datamatrix I simply use a Reportlistener to draw rectangles on the report. Reed-Solomom via a bit of C++ Royality free. :) Same for some 1D codes