1.we have realized the following 9 commands in the demo program: "AutoOpenComPort","CloseComPort","GetReaderInformation","Inventory","ReadSingleBlock","GetSystemInformation","ReadMultipleBlock","TransparentWrite" and "TransparentRead".

2.When debugging the demo program, you should put the DLL in VB6's default path or point out its absolute path; when running the final compiled exe demo program, you should put the DLL in the same directory as the exe demo program file exists.