Windows API functions are case sensitive, so it should be CopyFile.

>Dear Sir,
>
>When I run Following codes, it do nothing
>What is wrong?
>

>datadir="d:\c2007\tables\" &&Source
>backdir="d:\c2007\tables\Backup\" && Target
>
>=adir(afiles,datadir+"*.dbf")
>
>declare integer CopyFile in KERNEL32.dll ;
>	string @SourceFileName, ;
>	string @DestFileName, ;
>integer bFailIfExists
>
>nsucces=0
>for nt = 1 to alen(afiles,1)
>	nsucces=copyfile("datadir"+afiles[nT,1],"backdir"+afiles[nT,1],0)
>	wait window "Done"
>	if nsucces = 0
>		wait window "Error"
>		exit &&
>	endif
>endfor
>