I have a question to ask about the validation in the textbox shown in the screen dump.......I have attached a screen dump for your references......as u can see that, the numbers in each and every textbox is unique.......i do not want the same number to be appear in any of the textbox......may i ask ? if the user enters any of the number twice which i do not want it to happen, how do i check for the identical number after the user enters into the textbox.........thank u very much..........