>i want to put a separator for 1000 's but:
>use separator does n't work, neither setting in regional for that purpose

Set('Separator') will give you the separator and Set('Point') will give you the decimal character according to the regional settings.

You'll have to build your input mask from that.

Create your own textbox class and in the init, figure out an input mask:

ie - InpMask = "999" + Set('Separator') + "999" + Set('Separator') + 999 etc.

Then this.inputmask = InpMask

Alan