try dll 2\Project1.bpr
.........\Project1.cpp
.........\Project1.exe
.........\Project1.obj
.........\Project1.res
.........\Project1.tds
.........\Project1.~bpr
.........\Project1.~cpp
.........\Unit1.cpp
.........\Unit1.ddp
.........\Unit1.dfm
.........\Unit1.h
.........\Unit1.obj
.........\Unit1.~cpp
.........\Unit1.~ddp
.........\Unit1.~dfm
.........\Unit1.~h
.........\zyUSBDev.dll
.........\zyUSBDev.h
.........\zyUSBDev.lib
try dll 2