>I´ve this expression :ALLT(STR(ROUND(VAL(TRANSFORM(n_val,'99999.99')),2))).The result is a number without decimals,but I want that decimals appears rounded like this : Eg.:12.93 = 12.95,2450.22 = 2450.20 and so on.How can I do this ?

If you want to round to any number (for example, 0.05) you can use:

FUNCTION SpecialRound
LPARAMETERS nValue,nRoundTo
RETURN nRoundTo*ROUND(nValue/nRoundTo,0)
ENDFUNC

PS. Why VAL(TRANSFORM(...))? It seems redundant to me.