How can I maximize a window across multiple monitors?

Question

Using AutoHotkey, How can I bind a hotkey to stretch/maximize/span a window across multiple monitors so that it covers both displays?

Right now, I have to do this by man

Answer 1

I have two monitors at work and at home with my task bar on the left so I needed to tweak this script to ensure it moved the window correctly.

+#Up::
    WinGetActiveTitle, Title
    WinRestore, %Title%
   SysGet, Mon1, MonitorWorkArea, 1 
   SysGet, Mon2, MonitorWorkArea, 2 
   Monitor1Width := Mon1Right - Mon1Left
   Monitor2Width := Mon2Right - Mon2Left
   MonitorsWidth := Monitor1Width + Monitor2Width
   SysGet, Height, 79
   WinMove, %Title%,, %Mon1Left%, %Mon1Top%, %MonitorsWidth%, %Mon2Bottom%
return

+#Down::
    WinGetActiveTitle, Title
    WinRestore, %Title%
   SysGet, Mon2, MonitorWorkArea, 1
   Monitor1Width := Mon2Right - Mon2Left
   WinMove, %Title%,, %Mon2Left%, %Mon2Top%, %Monitor1Width%, %Mon2Bottom%
return