The instruction at "0x71c42b8c" referenced memory at "0x00000000". The memory could not be "written".

##</code><code>##

#!perl
use Win32::API;
getUsers();
################
sub getUsers{
	#usage:
	#info:
	my ($server,$level,$filter,$buffptr);
	my $maxlen = 0xffffffff;
	if(!$NetUserEnum){$NetUserEnum = new Win32::API("netapi32", "NetUserEnum", ['P','N','N','N','N','N','N','N'], 'P') || return 0;}
    my $rtn=$NetUserEnum->Call(
    	$server, 	#severname
    	0,			#level  0-20
    	$filter,	#filter
    	$buffptr,		#bufptr
    	$maxlen,		#prefmaxlen
    	\%entread,		#entriesread
    	\%totalentries,		#totalentries
    	\%resumehwnd,		#resumehandle
    	);
	}