How to programmatically move Windows taskbar?

I also have this need on Windows 7. Here is my take to do this using autohotkey script:

; This script will try to drag and move the taskbar to where the *current* mouse
; cursor is

; 0x111: WM_COMMAND, 424: lock/unlock taskbar, http://www.codeproject.com/KB/miscctrl/Taskbar_Manipulation.aspx
RegRead, TaskbarLocked, HKEY_CURRENT_USER, SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced, TaskbarSizeMove
If TaskbarLocked = 0
  SendMessage 0x111, 424, , , ahk_class Shell_TrayWnd   

WinActivate ahk_class Shell_TrayWnd
MouseGetPos targetX, targetY
ControlGetPos x, y, w, h, MSTaskListWClass1, ahk_class Shell_TrayWnd
MouseMove x+1, y+1
MouseClickDrag Left, x+1, y+1, targetX, targetY, 10

; often after dragging the taskbar to left or right side of a monitor, even though
; there are enough room to show two columns of icons, it will only show one column,
; it seems showing or hiding an icon will fix this
Menu, Tray, NoIcon
Menu, Tray, Icon

; lock the taskbar if it was previously locked
If TaskbarLocked = 0
  SendMessage 0x111, 424, , , ahk_class Shell_TrayWnd   

I have tested this on Windows 7 with classic window theme. To use this, assign a hotkey to call this script, then position mouse cursor to where you want to drag the taskbar to, then press the hotkey.