>Hi
>
>Everything works (I capture the barcode) until I call the updateScan method, which is a method on a business object that writes the barCode to a table, but it just as easily be writing to a textBox and it would crash, I get something like a "cross thread" error. I have written some code in the text box that captures the error, but that just does not feel right.
>
>hope all that makes sense
>
>thanks
>
>Stuart

Is your serialport code running in a seperate thread from the main GUI (like in a backgroundworker or something)? Otherwise Jim's links might solve your problem.