If you hope to use barcode function in several application at the same time, SDK/DLL is the best choice. you can encode more than 30 linear barcodes[Code 39+, Codabar, Code 2 of 5 Standard, Code 2 of 5 Industrial, Code 2 of 5 IATA, Code 2 of 5 Interleaved, Code 2 of 5 Data Logic, ITF-14, Deutsche Post Leitcode, Deutsche Post Identcode, Code 93, Code 128, MSI Plessey, Telepen ASCII, Telepen Numeric, Plessey Code, Pharmacode One Track, Korean Post Authority Code, Flattermarken, Facing Identification Mark, Pharmacode Two Track, Postnet , PLANET, Intelligent Mail, RM4SCC, Australia Post 4-state,Pharmazentral Nummer (PZN),EAN system barcodes,CODE 39] to image such as BMP,PNG,JPG,GIF image using C/C++/Delphi/VB language with several lines of code.. It support 9 error correction levels and several image styles such as background color, bar color, image quality, rotation angle,x-dimension and etc. You can use the library to develop application ,ActiveX, ATLCOM, ASP Control, .Net Control and etc. using Microsoft Visual stduio, Borland C++ Builder or other development tools support dynamic library linkage. We support five license modal: Single User license, Small Company license, 1 Developer License,5 Developer License,Unlimited Developer License. You can develop and distribute your application with one of those license modal depends your needs. A dinamic library is library of executable functins or data that can be used by a Windows Application. Typically, a DLL provides one or more particular functions and a program accesses the functions by creating either a static or dynamic link to the DLL. A static link remains constant during program execution while a dynamic link is created by the program as needed. DLLs can also contain just data. DLL files usually end with the extension .dll,.exe., drv, or .fon. A DLL can be used by several applications at the same time. Some DLLs are provided with the Windows operating system and available for any Windows app.