Yes, you are right!
since I failed to upload images to my tlp3742 (EPL), the only solution i've found to print my labels from vb.net is to print in zebradesigner to a .prn file, then in vb.net change the value of prn. file and send it to the printer in vb.net whit dos copy cmd, but now I have the problem that when I change the value of the command A142,185,3,b,1,1,N,"Cap." from "Cap." to "Sweater" the text is not centered on the label.
John