I'd suggest you could try using "Tiles"... you can locate it on the left hand side have the taskbar on the bottom horizontally.
There's also a rainmeter skin that looks that way, though I can't remember it's name atm.
Finally, the ObjectDock would have to change to the same theme as the taskbar skin... so choose the blinds you like, and then search the ObjectDock BG Gallery for the matching Zoomer . They usually go by the same name.....
If you're asking about or mean the default Aero taskbar, use the Aero Zoomer dock set to left side....
