For example if the Windows Firewall is OFF the status of an adapter is Connected.
When Windows Firewall is ON the status becomes Connected, Firewalled.
See the link below: http://adapterstatus.webng.com/
Is there a function I could use to change the adapter status into Firewalled?
I don’t think that there is a documented API/interface to do what you want, but probably you should be able to change the behaviour and view of visual elements (windows) by subclassing them with SetWindowsHookEx.