You cannot use anchor popup to do that.
But there are work around, for example you can draw the dialog box like this at 50x50 screen coord*:
use Tk;

$mw = MainWindow -> new;
$openbutton = $mw -> Button (
               -text => 'Open',
               -command => \&opensub,
               )-> pack;


sub opensub {
$top = $mw ->Toplevel;
$top -> wm('geometry', '0x0+50+50');
$top->overrideredirect(1);

$type_file = [['GIF Image', '.gif'], ['JPG Image', '.jpg']];

$file_openned = $top->getOpenFile(-filetypes => $type_file,
                -title => 'Choose an image',
                -defaultextension => \$type_file);
}

MainLoop;

[download]

Hope this help.

In reply to Re: Win32::FileOp window positioning? by didier
in thread Win32::FileOp window positioning? by spikey_wan

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.