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The following script will find any windows that have “Remote Desktop” in the title and resize them to be their maximum height and width. In fact, I tweaked it a little bit so that the window actually falls outside of the screen. This way I have more screen real estate for the desktop that I’m working in and I will also be able to quickly move between windows on my desktop.

;********************************************************************************
; Filename: maximize_window.au3
; Author: Kit Menke
; Date: July 30, 2009
; Description:
;   Resizes any window matching a certain search string to the given dimensions.
;   Useful for Windows you find you have to constantly resize.
;********************************************************************************

; any window that contains the following string will be resized
$windowTitleContains = "Remote Desktop"

; only match exact title names in this script
Opt("WinTitleMatchMode", 3)     ;1=start, 2=subStr, 3=exact, 4=advanced, -1 to -4=Nocase

; the new dimensions of the window to be resized to
; top left corner (x,y) coordinates
$winX = -4
$winY = -29
; the window's new width and height
$winWidth = 1024 - $winX*2
$winHeight = 768 - $winY

; get the list of windows and the string you want to check for
$var = WinList()

For $i = 1 to $var[0][0]
  ; Only display visble windows that have a title matching our search string
  $windowTitle = $var[$i][0]
  $containsTitle = StringInStr($windowTitle,$windowTitleContains)
  If $windowTitle <> "" AND IsVisible($windowTitle) AND 0 <> $containsTitle Then
    ResizeWindowWithExactTitle($windowTitle)
  EndIf
Next

Exit

Func IsVisible($handle)
  If BitAnd( WinGetState($handle), 2 ) Then
    Return 1
  Else
    Return 0
  EndIf
EndFunc

Func ResizeWindowWithExactTitle($winTitle)
    If WinExists($winTitle) Then
        WinMove($winTitle, "", $winX, $winY, $winWidth, $winHeight)
    EndIf
EndFunc

I then set up a little CMD file to call my au3 file (assumes AutoIt3.exe is in the same directory as your script, but you can obviously make this be whatever you want):

AutoIt3.exe maximize_window.au3

And then I have a shortcut to that CMD file on my quicklaunch that I can call whenever I need to resize my windows.