How to show up a print dialog box

[Jason - Polydiam.com]

By the way I'm using windows XP, I just can't get the print dialog box to
come up with these commands.

Anyone know any other commands I could use to print the images into a
specified size and show up the printer dialog box?

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I’m trying to print an image to a specified paper size; 8”x10”.
  

set the printRotated to true

  open printing with dialog
  
  print stack "Target" into 15,15,400,400
    
  close printing 

but it does not show the print dialog box (so a user can change the paper
size)
anyone know how to get it to show the print dialog box and still print into
the specified coordinates on the paper (and landscape)
Thanks

Jason