In fact, here is an example...

code:
; Created with the AutoItX ActiveX component.
; Get it at: http://www.hiddensoft.com/AutoIt/

$objAutoIt = CreateObject("AutoItX.Control")
If @ERROR
	"AutoIt Control not instantiated..." ?
	Copy @SCRIPTDIR+"\AutoItX.dll" %WINDIR%
	If @INWIN = "1"
		Shell "%COMSPEC% /c Regsvr32 /s %WINDIR%\AutoItX.dll"
	Else
		Shell "%COMSPEC% /c %WINDIR%\System\Regsvr32 /s %WINDIR%\AutoItX.dll"
	EndIf
	$objAutoIt = CreateObject("AutoItX.Control")
	If @ERROR "Unable to instantiate control: fatal error" Exit 1 EndIf
endif

If $objAutoIt
	$objAutoIt.BlockInput("On")
	; Do stuff here...
	$objAutoIt.BlockInput("Off")
EndIf