Your code should work. What seems to be a problem? You can try

IF TRANSFORM(retval, "@0") = "4A6F65"
* or
retval = "0x004A6F65"

>Is there any way I can do a comparison from char to hex?
>
>

>retval=FREAD(f,3)
>if retval=0x4A6F65
>  do something
>endif
>