|you can achieve that my moving the whole taskbar to the top of the screen:|
Make sure taskbar is not 'locked' by right-clicking an empty part of it and make sure 'Lock taskbar' is UN-ticked.
Now left-click empty part of taskbar and, while holding mouse button down, drag to top of screen (you can drag and drop it on the left or right of the screen as well if you prefer)
Now lock the taskbar again unless you prefer to leave it unlocked.
Any windows you open (including programs) will now extend to the bottom of the screen into the cracked area. If that bothers you, just drag the bottom window border up a little. For program windows, you'll have to do that once for each program.
The bottom border will maintain that adjustment across Windows sessions until you adjust it again.