How to remove taskbar border on auto-hide?

[questionmark]

Hi I have my taskbar on "autohide", but you still see a border when it's "hidden". Is it possible to remove this.. I was going to upload a screenshot of it but it doesn't show on screenshots.

Thanks in advance

 

[Neutron16]

You can always edit Windows theme yourself, but..

If you have a stand-alone monitor you can use hardware buttons to adjust vertical position of the screen. Basically, you can move the whole monitor's picture down by one or two pixels, and it will be out of the screen area.
On the downside when taskbar will pop up, you will be one pixel short.