... read function;Detailed development documentVC, VB, Delphi develop package, dynamic library DEMO and source code;Buttons, switches, timing, GSM / GPRS ... Multi Text Editor to edit the text. Set the font size ,color,font and so on .You can eid the analog ... the text playing.Using LS-T0(USB) LED CONTROLLER for the led display sign, led moving sign, led banner,led scrossing message sign, you can timing ...