Dear Holzer

You wrote

Do you read the data until mscomm stops receiving or is there some character passed (from the input device) at the end of the sent data you can check for?

1- I receive date , from Input Device, through command button.
2- The data comes into character shape
3- I sacen orignal data, weight, through a loop

Everything is working fine in Windows98 but problem occour in windowsXp.