Removing border around a Win32::GUI control

Question

whenever I use PerlApp to generate a binary of my projects, controls like the textbox and the listview have an ugly grey border around themselves. (example picture)

I used the following code to create the listview:

my $listview = $main->AddListView(
    -size => [250,250],
    -name => 'listview',
    -pos => [50,50],
    -gridlines => 1,
    -sunken => 0,
    -border => 0,
    -borderstyle => 0,
);

Is there a solution to this problem? Thank you,

Max.