undef $^E;
undef $!;
undef $?;
print "using system \n";
system("net use v: \\\\SERVERNAME\\SHARENAME"); 
print "dollar caret E reports          $^E \n";
print "dollar Exclamation mark reports $!  \n";
print "dollar question mark reports    $?  \n";  
print "using backticks \n";
`net use v: \\\\SERVERNAME\\SHARENAME`; 
print "dollar caret E reports          $^E \n";
print "dollar Exclamation mark reports $!  \n";
print "dollar question mark reports    $?  \n";

##</code><code>##

using system
System error 85 has occurred. The local device name is already in use.
dollar caret E reports          The system cannot find the file specified
dollar Exclamation mark reports
dollar question mark reports    512

using backticks
System error 85 has occurred. The local device name is already in use.
dollar caret E reports          The pipe has been ended
dollar Exclamation mark reports
dollar question mark reports    512