Return variable from Function

Question

I have a function that if I write-host the variable $RDPUser from within the function it returns true, however I can't seem to get the variable to be seen outside the function, even if I make it global
Function global:RDP (){
$WorkstationName = Get-Content env:ComputerName
    # Run the qwinsta.exe and parse the output
    $queryResults = (qwinsta /server:$WorkstationName | foreach { (($_.trim() -replace "\s+",","))} | ConvertFrom-Csv)  
    # Pull the session information from each instance
    ForEach ($queryResult in $queryResults) {
        $RDPUser = $queryResult.USERNAME
        $sessionType = $queryResult.SESSIONNAME
        # We only want to display where a "person" is logged in. Otherwise unused sessions show up as USERNAME as a number
        If (($RDPUser -match "[a-z]") -and ($RDPUser -ne $NULL)) {  
            # When running interactively, uncomment the Write-Host line below to show the output to screen
             $LoggedOnUser = $RDPUser
         $RDPHost
            #$SessionList = $SessionList + "`n`n" + $ServerName + " logged in by " + $RDPUser + " on " + $sessionType
#Get Current Time
$time2 = Get-Date
#Get Logged-On User Details
$user = Get-WmiObject Win32_Computersystem -ComputerName "."
#Get Time User Logged On
$time1 = Get-EventLog -LogName System -InstanceId 7001 -Newest 1
#Set Variables for SQL
$LogonDateTime = get-date -Format "MMM dd yyyy HH:mm:ss"
$WorkstationName = Get-Content env:ComputerName
$LoggedOnUser = $user.UserName
$TimeToLogon = $time2.TimeOfDay.TotalSeconds - $time1.TimeGenerated.TimeOfDay.TotalSeconds
$logonType = "Logon"
#If workstation = QATest Set $result
if ($workstationName -eq "QAtest") {$result = RDP ; $LoggedOnUser = $result}
write-host $LogonDateTime
write-host $WorkstationName
write-host $LoggedOnUser
write-host $TimeToLogon
write-host $logonType
Alter De Ruine

Answer 1

For some reason I needed my If statement inside the function:
Function RDP (){
$WorkstationName = Get-Content env:ComputerName
    # Run the qwinsta.exe and parse the output
    $queryResults = (qwinsta /server:$WorkstationName | foreach { (($_.trim() -replace "\s+",","))} | ConvertFrom-Csv)  
    # Pull the session information from each instance
    ForEach ($queryResult in $queryResults) {
       $script:RDPUser = $queryResult.USERNAME
        $sessionType = $queryResult.SESSIONNAME
        # We only want to display where a "person" is logged in. Otherwise unused sessions show up as USERNAME as a number
        If (($RDPUser -match "[a-z]") -and ($RDPUser -ne $NULL)) {  
            # When running interactively, uncomment the Write-Host line below to show the output to screen
         $RDPUser
            #$SessionList = $SessionList + "`n`n" + $ServerName + " logged in by " + $RDPUser + " on " + $sessionType
if ($workstationName -eq "QAV-RDHOST") {$script:LoggedOnUser = $RDPUser}
#Get Current Time
$time2 = Get-Date
#Get Logged-On User Details
$user = Get-WmiObject Win32_Computersystem -ComputerName "."
#Get Time User Logged On
$time1 = Get-EventLog -LogName System -InstanceId 7001 -Newest 1
#Set Variables for SQL
$LogonDateTime = get-date -Format "MMM dd yyyy HH:mm:ss"
$WorkstationName = Get-Content env:ComputerName
$LoggedOnUser = $user.UserName
$TimeToLogon = $time2.TimeOfDay.TotalSeconds - $time1.TimeGenerated.TimeOfDay.TotalSeconds
$logonType = "Logon"
#Call function RDP
RDP
Alter De Ruine