I want to test if I can write to a mapped drive. The code below does this by simply:
1 seeing if –d test means the drive can be seen;
2 trying to open a ‘test’ file and write one word.

use strict "vars";

my ($map_letter, $en_num, $en_mes, $net_file, $res_open);

$map_letter = "H:\\";


if(-d $map_letter) {

    $net_file = ">" . $map_letter . "netfile.txt";

    $res_open = open(NETOP, $net_file);

    if($res_open == 1) {

        print NETOP "Hello\n";

        close(NETOP);
    
        print "netfile print OK\n";

    } else {


        $en_num = Win32::GetLastError();
        $en_mes = Win32::FormatMessage($en_num);
    
        print "netfile print failed number <$en_num>\nmessage <$en_mes
+>\n";
    }
} else {

    $en_num = Win32::GetLastError();
    $en_mes = Win32::FormatMessage($en_num);
    print "could not find mapped drive <$map_letter>\nnumber <$en_num>
+\nmessage <$en_mes>\n";

}
[download]

I wondered if there was a more elegant way:
1 where I could find out what the mapped drive was set to;
2 to tell if the drive was shared in a way that I could write the file.