Hi All,
Just to finish, I'll show you the code that works for me to plot circles and ellipses.
It can be easily modified to produce arcs of circles and ellipses.
 Code:
 
$system = CreateObject("kixtart.system")

If Not $System
  $nul= MessageBox("KiXtart.Net Not Initiated. This Script Will Now Close.","Error",16)
  Quit()
EndIf

$form = $system.form()
$form.top = 0
$form.left = 0
$form.width = 1024
$form.height = 768
$form.text = "TestLine.kix  WFB  " + @time + "  " +@date
$form.show

$form.drawwidth = 1

For $i = 0 to 100
   $form.pset($i, $i)
Next

$math = $system.math()
$pi = $math.pi
$2pi = 2.0 * $pi

Circle(200,200,50)
Ellipse(300,300,50,35)

While $form.visible
   $ = Execute($form.doevents())
Loop

Return

Function Circle($x, $y, $r)
$t = 0.0
While $t < $2pi
   $xx = $math.cos($t) * $r + $x
   $yy = $math.sin($t) * $r + $y
   $form.pset($xx,$yy)
   $t = $t + 0.01
Loop
EndFunction

Function Ellipse($x, $y, $h, $v)
$t = 0.0
While $t < $2pi
   $xx = $math.cos($t) * $h + $x
   $yy = $math.sin($t) * $v + $y
   $form.pset($xx,$yy)
   $t = $t + 0.01
Loop
EndFunction


I hope this is useful to someone.
Cheers,
_________________________
Bill