Seems to work pretty good for me. Maybe I changed (fixed) something by accident. Here's the code, using Kixtart 4.10 RC1 at the moment.

code:
break on

$ElementArray="machine1","machine2","machine3"

$Window = IECreateWindow("This Damn Thing",300,300,640,480)

IEWrite($Window,"hello","Arial","4","#00ff00")
IEWrite($Window,"hello1",,"2","#ff0000")
IEWrite($Window,"hello2","Courier","5","#0000ff")
IEWrite($Window,"hello3")

IEComboBox($Window,"This Damn Thing","Test IT",$ElementArray)  ;pass array

$b1=IEAddButton($Window,"Button1",10,0,50,25)
$b2=IEAddButton($Window,"Button2",70,0,50,25)
$b3=IEAddButton($Window,"Button3",130,0,50,25)

?"pause..." get$k  

$window.quit
$window = 0  
exit 1
;&&&&&&&&&&&&&&&&&&&&&&&


;***********************************************************************************************

Function IEComboBox($Window,$title,$text,$ElementArray)

	$html='<HTML><HEAD><TITLE>$title</TITLE></HEAD><BODY><BR>$text<BR>
	       <OBJECT ID="ComboBox" WIDTH=200 HEIGHT=24  CLASSID="CLSID:8BD21D30-EC42-11CE-9E0D-00AA006002F3">
	       </OBJECT></BODY></HTML> '
	$window.document.write('$html')

	WHILE $window.busy <> 0 AND @ERROR = 0	LOOP

	$combobox = $IE.document.GetElementById("combobox")

	for each $element in $ElementArray
		$=$combobox.additem("$Element")
	next

	$combobox.value=$ElementArray[0]

	EndFunction


;***********************************************************************************************
Function IECreateWindow($title,$left,$top,$width,$height, optional $html)
	$ie = createobject("internetexplorer.application")
	$ie.addressbar 	= 0
	$ie.menubar 	= 0
	$ie.toolbar 	= 0
	$ie.statusbar 	= 0
	$ie.top 	= $top
	$ie.left 	= $left
	$ie.width 	= $width
	$ie.height 	= $height
	$ie.navigate("about:blank")
	while $ie.busy and $ie.readystate <> 4 and @error = 0 loop
	$ie.document.body.scroll 	= no
	if $html
		$ie.document.write('$html') 
	else
		$ie.document.write('<title>$title</title>')
		endif 
	$ie.document.body.bgcolor 	= "threedface"
	$ie.document.body.border 	= "1px solid #cccccc"
	$IECreateWindow = $ie
	$ie.Visible = 1  
	while setfocus("$title") <> 0 loop
	EndFunction

Function IEWrite($Window,$text, optional $font, optional $size, optional $color, optional $Clear)
	if not $font	$font='Verdana, Helvetica, sans-serif'		endif
	if not $size	$size='3'					endif
	if not $color	$color='#000000'				endif
	if not $bgcolor	$bgcolor='#ffffff'				endif
	$HTML = '<font size="$size" FACE="$font" color="$color">$text<br></font>'
	$window.document.write($HTML)
	WHILE $window.busy <> 0 AND @ERROR = 0	LOOP
	EndFunction

Function IEAddButton($Window,$Caption,$Left,$Top,$Width,$Height)
	dim $Button
	$Button = $Window.Document.CreateElement("input")
	$Button.Type 	= "Button"
	$Button.Value 	= $Caption
	$Button.Style.Position 		= "Absolute"
	$Button.Style.PixelTop 		= $Top
	$Button.Style.PixelLeft 	= $Left
	$Button.Style.PixelWidth	= $Width
	$Button.Style.PixelHeight 	= $Height
	$Button = $Window.Document.Body.AppendChild($Button)
	$IEAddButton = $Button
	EndFunction

Function IESetBackColor($Window,$Color)
	$Window.Document.Body.BGColor = $Color
	EndFunction



Function IEInputBox($title, Optional $prompt, optional $Ok, optional $Cancel)
	Dim $click, $html, $Window, $status, $click, $button, $box

	If not $prompt 		$prompt = "Please enter your password."		endif
	If not $ok 		$ok	= "OK"					endif
	If not $Cancel 		$cancel = "Cancel"				endif

	$html = '
		<html><head><title>$title</title><style>
		<!---body{ background-color: silver; color: black;font-family: tahoma, arial; font-size: 
		  10pt; margin: 3px "input.tbox { border: lpx black solid;}td { font: 10pt tahoma; }--->
		  </style></head>
		<body scroll=no >
		<table align=center>
	 	<form name=frm>
	   	 <tr>
	   	  <td align=right>$prompt </td>
	 	    <td colspan=2><input id=input value="" class=tbox></td>
		    </tr>
		   <tr>
		     <td><input id=ok type=button value=" $ok " onclick="frm.status.value=1">
			 <input type=hidden id=status name=status value=0></td>
		     <td align=right><input id=cancel type=button value=" $Cancel " 
			 onclick="frm.status.value=2"></td>
		     </tr>
		   </form>
		</table></body></html>'

	$Window = IECreateWindow($title,100,100,300,130,$html)
	while $window.busy and $window.readystate <> 4 and @error = 0 loop
	
	$window.document.GetElementById("input").focus
	$status = $window.document.GetElementById("status")
	$click = $window.document.GetElementById("input")
	$button= 0		 $box=0
	while @error = 0 and $button = 0
		$button=$status.value
		$box=$click.value
		select
			case $button = "1"		$IEInputBox = $box
			case $button = "2"		$IEInputBox = "Cancel"
			endselect
		loop
	$window.quit
	$window=""
	EndFunction