Reza,

Maybe you ought to just use a textbox instead, let the user type either numbers or characters and then in the LostFocus() you can determine what they entered, seek the correct row and assign the numeric key to the place you want to store the information.

>possible it, i show in combobox my character fields but when user only type a numric then combo show character field in it
>i bound to combobox a table with two fields(a numeric field and a character field)
>and i want to use and pass numeric fields to other table