myShowDeskTop (AutoIt script)

For this you'll need AutoIt

...

;-
; myShowDeskTop - minimize non-toolwindows 
;-
; Description
;-
; 'Show Desktop' & MinimizeAll 
; minimize EVERYTHING  including 
; Google Desktop and floating 
; toolbars...this excludes
; those not in 'my' list
;-
$var = WinList()
For $i = 1 to $var[0][0]
  If $var[$i][0] <> "" _ 
   And IsVisible($var[$i][1]) _
   And NOT IsMinimized($var[$i][1]) _
   And $var[$i][0]<>'EnvSW' _
   And $var[$i][0]<>'FB © 2008' _
   And $var[$i][0]<>'Program Manager' _
   Then 
 WinSetState($var[$i][0],"",@SW_MINIMIZE )
  EndIf
Next
Func IsVisible($handle)
 If BitAnd( WinGetState($handle), 2 )  Then 
  Return 1  
 Else  
  Return 0
 EndIf
EndFunc
Func IsMinimized($handle)
 If BitAnd( WinGetState($handle), 16 )  Then 
  Return 1 
 Else  
  Return 0
 EndIf 
EndFunc