Hi All , there is an application for 8051 processor that when u write ur code in asm , and then convert to hex file , this win application (EZDL.4) , it Write ur programm to the Microntroller 8051 chip . apparently , this win application written in C++ . here the link of this win application : http://chaokhun.kmitl.ac.th/~kswichit/easy1/easy.htm and I attached the pic of this win application thanx a lot for any help