If you don't get the keypress thing to work, why don't you go with the solution of Jon Love? Setting the Inputmask to 9999 works and only accept digits.

Besides that, there are 2 keypress events: form.keypress and textbox.keypress. To surpress ~ for that textbox, the textbox.keypress is of course the better event, you don't want to surpress that key for all controls on the form, do you?

Is it maybe, that your barcode sanner is such, that it does not act as a keyboard, but is connected to COM/RS232? Then keypress won't work, you would need to change something, which reads the barcode scanner input and stores it in the textbox.value.

Neither keypress nor inputmask would solve that, as you can set textbox.value="abcd", even if the inputmask is "9999". So look out for code setting the barcodetextbox.value.

Bye, Olaf.