>I m using in the function Strtofile() and I want to add a carriage return always when writhing to the file, how do I do it ?

You can store new line characters into variable or use compile time constant.

lcCRLF = CHR(13) + CHR(10) && New line = Carrige Return + Line Feed
lcStr = "...."
Strtofile(lcStr + lcCRLF, lcFileName)

* or

#DEFINE ccCRLF CHR(13) + CHR(10) && New line = Carrige Return + Line Feed
lcStr = "...."
Strtofile(lcStr + ccCRLF, lcFileName)