Yes! Hugo... that is what I was looking for. Thanks a lot. :)

>Marc, are you looking for something like this?
>
>? operate('120+5%') && -> 126
>? operate('120-5%') && -> 114
>? operate('110+10+5%) && -> 126
>
>value=120
>perc=5
>? operate('value+perc%') && -> 126
>
>
>

>function operate
>lparameters lcOperation
>local lnPosPlus, lnPosMinus, lnPos, lcValue, lcPerc
>
>lnPosPlus=rat('+', lcOperation)
>lnPosMinus=rat('-', lcOperation)
>
>if (lnPosPlus=0 and lnPosMinus=0) or right(lcOperation, 1)#'%'
>	return null && or whatever, like evaluate(lcOperation)
>else
>	lnPos=max(lnPosPlus, lnPosMinus)
>	lcValue=left(lcOperation, lnPos-1)
>	lcPerc=substr(lcOperation, lnPos+1, len(lcOperation)-lnPOs-1)
>	lnReturn=evaluate(lcValue+substr(lcOperation, lnPos, 1)+'(('+lcValue+')*'+lcPerc+'/100)')
>endif
>return lnReturn
>