Hi! Folks,:) Below are the few queries that have arised in my mind after looking at the code in file "inpout32drv.cpp". These are few of the hardcoded paths, that I have found, 1. C:\kernel_mode_driver_source\i386\hwinterface.pdb 2. nsf.\i386\hwinterface.sys 3. In CreateService function call you are using the hardcoded path "System32\\Drivers\\hwinterface.sys", but I have the "hwinterface.sys" file in the application directory only. Also, I have no such file in my "system32\drivers" directory. First of all I don't know these paths stands for what? Second thing is, Any of the above specified paths are not valid on my system. Can these be a reason, that program is not working on my system? I am sending the same at your e-mail box. Thanking You, Regards, Ritesh.