In the ActivePerl FAQ: Is there a way to do GUI programming with ActivePerl?

It refers to Win32::GUI, which seems to be the module's author's page; it also has a lot of useful info about other Win32 modules, as well as links to precompiled versions for the compiler impaired.

Below is some (untested) code based on a message from the Win32::GUI mailing list:

use Cwd;

# returns selected file name; undef if Cancel
sub file_open_dialog {
  my $file_spec = "*.bmp\0" . " " x 256; # init a C-friendly buffer
  my $dir = cwd;

  GUI::GetOpenFileName(
    -title => 'Load/Save File',
    -owner => $Win,
    -directory => $dir,
    -file => $file_spec,
  )
}
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