Quote Originally Posted by Elios115
Text2.Text = MSComm1.OutBufferCount

but it returned nottin which means the serial port isnt getting the byte!

can anyone help with this?
It's probably because you are not sending a lot of data, and it's sending the data right away. So when you call MSComm1.OutBufferCount, you always get 0 becasue the data is already sent.

Send a couple of kilo bytes (more than 1024 bytes), and then you will see that the MSComm1.OutBufferCount will slowly go to 0 as it's sending...