this below some of content of my file config.dim (text format) when i run the routine the program search for the dim and find this file and make default my problem is each time i run i need to modify some of text in this file how to write small routine to modify this file using findfile "r" "w"... ===================================================== :5 - Color 5 - blue - bore CB_ - Front char_ Back char :6 - Color 6 - magenta - Fine bore FBT_ - Front char_ Back char :1 - Color 1 - white/black - special DT%%C3,W/C_+0.005/S_ - Front char_ Back char :8 - Color 8 - off white/black - special MILL%%C2,W/C_TO SIZE, - Front char_ Back char <<===== only this text need to change :9 - Color 9 DT_ - Front char_ Back char :10 - color 10 DT_ - Front char_ Back char