Hi

Thanks for replying. It is not working for me. It gave syntax error. Then I adjusted quotes. But now it says "invalid input mask" at run time. I am using it as ..

thisform.Grid1.Column3.DynamicInputMask = "IIF(EMPTY("+thisform.Grid1.RecordSource + ".phone),'','@R (###)###-####')"


column3 is grid column with phone #

phone is the name of field in table(query)

Thanks