I think it would with following adjustment

? Round(lnNum, -(Len(Strtran(Transform(lnNum),"-"))-1))

>I didn't know, that round function accepts negative second parameter. Would it work for negative numbers (not that I need it, but now just from curiosity) :)?
>
>>

lnNum = 4567
>>? Round(lnNum, -(Len(Transform(lnNum))-1))

>>
>>>Hi everyone,
>>>
>>>I'd like to convert numbers to the following:
>>

>>>5->5            ROUND(...,0)
>>>52->50          ROUND(...,-1)
>>>333->300        ROUND(...,-2)
>>>4567->5000      ROUND(...,-3)
>>>1234567->1000000, e.g. to the round number.

>>>
>>>What would be the simplest algorithm for this?
>>>
>>>Thanks in advance.