byte[] cBuf = new byte[14];
IntPtr MachineVer = System.Runtime.InteropServices.Marshal.AllocHGlobal(14);
int x = OcxClass.FY_GetMachineTime(MachineVer);
Marshal.Copy(MachineVer, cBuf,0,14);
string xx= Encoding.ASCII.GetString(cBuf);

未写完整...

   public static extern int FY_GetMachineVer(IntPtr sRet);

C#调用C++DLL