use strict;
use warnings;

use Data::Dumper;
use Win32::API;

Win32::API::Struct->typedef( POINT => qw{
    LONG x;
    LONG y;
});

Win32::API::Struct->typedef( PCURSORINFO => qw{
    DWORD cbSize;
    DWORD flags;
    HCURSOR hCursor;
    POINT ptScreenPos;
});

my $pci = Win32::API::Struct->new('PCURSORINFO');

$pci->{cbSize} = $pci->sizeof();

Win32::API->Import("user32", "BOOL GetCursorInfo(PCURSORINFO pci)");

print Dumper($pci);  # before, empty but for cbSize

my $result = GetCursorInfo($pci) or die $^E; # DIES HERE, RESULTS BELOW

print Dumper($pci);  # after, hopefully full of useful information