Help on using hashtables with sub structures inside

Question

Hi everyone,
I'm currently working on a script that scans Active Directory for computers, and lists current users logged, and logs to an hashtable the username as key, and a count as a value.
After that it sends an email with the list. This part is all developed and working. Now I want to go further, and in the hash table, I would like to have as the key the username, and as the value the counter and a list of the computer names where the user
is logged on.
I have this code for working with the hashtable:
ForEach ($c in $computer) {
#Get explorer.exe processes
$proc = gwmi win32_process -computer $c -Filter "Name = 'explorer.exe'"
#Go through collection of processes
ForEach ($p in $proc) {
$temp = "" | Select Computer, Domain, User
$temp.computer = $c
$temp.user = ($p.GetOwner()).User
$temp.domain = ($p.GetOwner()).Domain
$report += $temp
If($UsersList.ContainsKey($temp.user) -eq 1){
$UsersList[$temp.user] = $UsersList[$temp.user] + 1
#$UsersList
Else {
$UsersList.add($temp.user,1)
Can I have it the way I'd like, or have to change my approach?
Thanks in advance
Nuno Silva

Answer 1

Thanks for the help. One more question regarding printing the arraylist.
I use the code below to print everything. I can print successfully the key and value but get an error on the computerlist.
($UsersList.GetEnumerator() |
Sort-Object Value -descending |
% { "{0}, {1} - {3}" -f $_.key, $_.value.Count, $_.value.ComputerList })
Error formatting a string: Index (zero based) must be greater than or equal to zero and less than the size of the argument list..
+     % { "{0}, {1} - {3}" -f $_.key, $_.value.Count, $_.value.ComputerList[0] })
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: ({0}, {1} - {3}:String) [], RuntimeException
    + FullyQualifiedErrorId : FormatError
Error formatting a string: Index (zero based) must be greater than or equal to zero and less than the size of the argument list..
How can I print it out?
Thanks in advance,
Nuno Silva