![]() However, a computer will almost certainly have more than one network interface, even if some of them are virtual. In this case you would not want a new NetworkInterface, but to get an instance of an existing one. You do this by creating a New object using whatever construction mechinizms available to the type, or you set the variable equal But it has not yet been assigned to an instance of a NetworkInterface object, so the variable's current value is Nothing.īefore you can call any methods against the variable, you must assign it to an object instance of the approriate type. ![]() Is of the type NetworkInterface and so it can only represent NetworkInterface objects. You did this by using the dimension variable keyword Dim, typing a variable name (network), typing the As keyword, and then specifying the type NetworkInterface. You have created a variable of type NetworkInterface named network. And then you are further warned that a null reference exception may occur. If you hover your mouse over this line, you will get a tooltip stating that variable "network" has been used before it has been assigned a value. #How to find mac address of wireless adapter codeThe code you've posted should be generating a little green squigly line under the word network in the line where you are trying to assign the label's text. You've taught me everything I know but not everything you know. Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged If nics Is Nothing OrElse nics.Length bytes.Length - 1 Then Oh and you can remove the " & computerProperties.HostName & computerProperties.DomainName & vbCrLf) ![]() It seems to work well for what you may need. ![]() I can't help you with your code but I got the following code, and altered it, from this link. ![]()
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