>Try:

>thisform.Grid1.Column.DynamicInputMask = "IIF(TheField%1=0,'9999','9999.999')"
>Not tested.

TESTED

Not what I wanted to do but I found the way.

Your solution makes a record not int is shown with decimals, integer without decimals. Perfect.

What I wanted to do was: Just one with decimals? Everyone with decimals.

I don't know why when I tested inputmask property it didn't work, so I thought dynamicinputamask would do the miracle.

Inputmask property is the way.

Thank you very much.

Héctor