Not Changing Computer Name, but changing $env:ComputerName

Question

I am trying to change the ComputerName on a windows machine. I am having a very strange result.

The Code that I'm using is:

public class MachineService
{
      [DllImport("Kernel32.dll")]
      [return: MarshalAs(UnmanagedType.Bool)]
      private static extern bool SetComputerNameA([MarshalAs(UnmanagedType.LPStr)] string computerName);

      [DllImport("Kernel32.dll")]
      [return: MarshalAs(UnmanagedType.Bool)]
      private static extern bool SetComputerName([MarshalAs(UnmanagedType.LPStr)] string computerName);

      [DllImport("Kernel32.dll")]
      [return: MarshalAs(UnmanagedType.Bool)]
      private static extern bool SetComputerNameEx(ComputerNameFormat NameType, [MarshalAs(UnmanagedType.LPStr)] string computerName);


    public static bool ChangeName(string name)
    {
      var envVar = SetComputerName(name);
      var ex = SetComputerNameEx(ComputerNameFormat.ComputerNamePhysicalNetBIOS, name);
      return envVar && ex;
    }
}

It does set the Environmental Variable ComputerName but it doesn't set the name of the device. please see the images below.

EDIT It has changed the registry.

Answer 1

If I read the documentation correctly you should:

• be using ComputerNamePhysicalDnsHostname instead of ComputerNamePhysicalNetBIOS
• and you should NOT call SetComputerName before SetComputerNameEx