How to check the RIGHT COM PORT is Connected VB Net

Projects Interfacing w/ Software on the Computer
1

Hi, all im newbie with Arduino, i did buy Uno R3 and want to connect it to computer using USBport which is appear to be COM Port in Windows...

I put all the available COM port in ComboBox and set the baud rate to 9600 with one button label "connect"
I want to display a message when the right/wrong com port selected or connected to the board, how to code it with VB net?
And does the board need to code too?

Kindly advise, thank you.

2

I want to display a message when the right/wrong com port selected or connected to the board, how to code it with VB net?

First, you have to decide whether the selected COM port is the right one. What is your criteria for making this decision?