>Hi Dragan,
>
>Would mind explaining a little further. I'm trying to hack your response with my limited knowledge of using the Left() operator within the interactive change. Would you mind showing me a little sample code. I didn't understand how to determine the "m" and the "n" or m-n??
>
>Your time is very appreciated!

I don't have any code, but... let's try:

* interactivechange
dodefault()
cMask="99-999-9-99-999-999-9" && can't remember what it really was
cTxt=this.text
nLen=len(cTxt)
nMaskLen=nLen
cTempMask=left(cMask,nLen)
do while occurs("9", cTempMask)<nLen
   nMaskLen=nMaskLen+1c
   cTempMask=left(cMask,nMaskLen)
enddo
this.function="R"
this.inputmask=cTempMask

Haven't tried this, so this is under the assumption that this.text doesn't include the dashes if .function="R"; if it does, then cTxt=chrtran(this.text, "-", "").