diff --git a/Notes.md b/Notes.md
index 1bd5aa4..7936685 100644
--- a/Notes.md
+++ b/Notes.md
@@ -174,6 +174,8 @@ https://adamtheautomator.com/hyper-v-powershell/
 
 https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_classes?view=powershell-7.2
 
+https://livebook.manning.com/book/windows-powershell-in-action-third-edition/chapter-19/64
+
 [//]: # (https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_functions_advanced_parameters?view=powershell-7.2)
 
 
diff --git a/Testing/hosts.txt b/Testing/hosts.txt
new file mode 100644
index 0000000..76c8bc8
--- /dev/null
+++ b/Testing/hosts.txt
@@ -0,0 +1,3 @@
+test1
+test5
+rest1
diff --git a/Testing/hyperv_list b/Testing/hyperv_list
deleted file mode 100644
index 2f8036f..0000000
--- a/Testing/hyperv_list
+++ /dev/null
@@ -1,2 +0,0 @@
-host1
-host2 host3
\ No newline at end of file
diff --git a/Testing/hyperv_list.txt b/Testing/hyperv_list.txt
new file mode 100644
index 0000000..5b68443
--- /dev/null
+++ b/Testing/hyperv_list.txt
@@ -0,0 +1,2 @@
+host1
+host2 host3 hv01
\ No newline at end of file
diff --git a/Testing/simple_for.ps1 b/Testing/simple_for.ps1
index 9e29c4d..1d1dbc5 100644
--- a/Testing/simple_for.ps1
+++ b/Testing/simple_for.ps1
@@ -1,72 +1,138 @@
 # Author: Oriol Filter
-# Date: 04/04/2022
-
+# Date: 06/04/2022
 
 
+$DebugPreference = "Continue"
+$ErrorActionPreference = "Stop"
 $SCRIPT_PATH=$PSScriptRoot
-
+$HYPERV_FILE = "$SCRIPT_PATH/hyperv_list.txt"
+$HOSTS_FILE = "$SCRIPT_PATH/hosts.txt"
 ## Objects
 
 class VirtualizationServer {
-    [string]$URL
-    [bool]$Authenticated=$false
+    [string]$url
+    [Boolean] __FindHost ($vname) {
+        $type=$this.GetType().BaseType
+        Write-Output "Find Host not implemented type $type"
+        return $false
+    }
+    [Boolean] FindHost ($vname) {
+        Write-Output 123
+        return $this.__FindHost($vname)
+    }
+
 }
 
-class HypervServer: VirtualizationServer{}
+class HypervisorServer: VirtualizationServer{
+    [Boolean] __FindHost ($vname) {
+        # Invoke-Command -ComputerName $this.url { Get-VM } | Write-Host
+        $result=$false
+        try
+        {
+            $result=Invoke-Command -ComputerName $this.url {
+                Param ($name) Get-VM -Name $name
+            } -ArgumentList $vname | Out-Null
+        }
+        catch
+        {
+            Format ("{0}: {1}",$this.url,$Error[0]) | Write-Debug
+        }
+        return $result
+    }
+}
 class VMWareServer: VirtualizationServer{}
 
+class VirtualizerManager{
+    [Array]$_connected_servers=@()
+    [Hashtable]$_found_vm=@{}
+    [Boolean] __log_in($url){
+        $status_message=""
+        $result=$false
+        try {
+            $result=Invoke-Command -ComputerName $url { $true }
+            $status_message = "OK"
+        }
+        catch [System.Management.Automation.Remoting.PSRemotingTransportException] {
+            $status_message = Format("Error '{0}'",$_.Exception.GetType().fullname)
+        }
+        finally {
+            $message = [string]::Format(">> [{0}] {1}",$url,$status_message)
+            Write-Debug $message
+        }
+        return $result
+    }
+    append_session($type,$url)
+    {
+        #        $Allowed_Types = @(
+        #        VMWareServer;
+        #        HypervisorServer
+        #        )
+        #$Allowed_Types
+        $type.GetType().IsValueType
+        $result = $this.__log_in($url)
+        if ($result)
+        {
+            $server=$type::new()
+            $server.url=$url
+            $this._connected_servers+=$server
+        }
+    }
+    [Array] connected_servers() {
+        return $this._connected_servers
+    }
+    find_host($vname){
+        $hostlist=$vname
+        if ($hostlist -is [Array]){
+            $hostlist=@($hostlist)
+        }
+        foreach ($_vname in $hostlist)
+        {
+            foreach ($server in $this.connected_servers)
+            {
+                Write-Host "<>< $server ><>"
+                $result = $server.FindHost($_vname)
+                Write-Host [String]::Format(">> {0} found in {1}? {2}", $_vname, $server.url, $result)
+            }
+        }
+    }
+
+}
+
 
 # Get hyperv's
-filter Get-Hyperv
+function Get-Hosts-From-File($filepath)
 {
-
-    $HYPERV_FILE = "$SCRIPT_PATH/hyperv_list"
-
     ## In a future use a yaml as a .conf (with the hyperv and vmware listed)
-    #$__HYPERV_FILE = Get-Content "$_SCRIPT_PATH"
-    $HYPERV_FILE = "host1
-host2 host3"
-
-
-    $HYPERV_LIST = $HYPERV_FILE.Split()
-
-
-    $HYPERV_ARRAY=@()
-    foreach ($url in $HYPERV_LIST)
+    $file_content = Get-Content "$filepath"
+    $splitted_file_content = $file_content.Split()
+    $host_array=@()
+    foreach ($hostname in $splitted_file_content)
     {
-        if ($url)
+        if ($hostname)
         {
-            [HypervServer]$new_hyerv=[HypervServer]::new()
-            $new_hyerv.URL=$url
-            $HYPERV_ARRAY+=$new_hyerv
+            $host_array+=$hostname
         }
     }
-    return $HYPERV_ARRAY
+    return $host_array
 }
 
-function Check-Access($hv_arr) {
-    foreach ($connection in $hv_arr)
-    {
-        Invoke-Command -ComputerName $connection.URL | out-null
-        $connection.Authenticated=$?
-    }
-}
-
-function Print-Connections-Status($vs_arr) {
-    foreach ($connection in $vs_arr)
-    {
-        $connection
-    }
-}
-
-$hyperv_arr=Get-Hyperv
-
-Check-Access($hv_arr)
-#$hyperv_arr.GetType()
-
-Print-Connections-Status($hyperv_arr)
-
-
-
 # Advanced params?
-# https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_functions_advanced_parameters?view=powershell-7.2
\ No newline at end of file
+# https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_functions_advanced_parameters?view=powershell-7.2
+function load_hyperv($manager) {
+    $hyperv_url = Get-Hosts-From-File($HYPERV_FILE)
+    foreach ($url in $hyperv_url) {
+        $manager.append_session([HypervisorServer], $url)
+    }
+}
+
+
+function Main{
+    $manager = [VirtualizerManager]::new()
+    load_hyperv($manager)
+    $manager.connected_servers()
+    $vmhosts= Get-Hosts-From-File($HOSTS_FILE)
+    $manager.find_host($vmhosts)
+}
+
+
+Main
diff --git a/placeholder.md b/placeholder.md
new file mode 100644
index 0000000..97eb9a2
--- /dev/null
+++ b/placeholder.md
@@ -0,0 +1,7 @@
+something |Select –Property
+Get-Member
+
+Select-Object
+https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/select-object?view=powershell-7.2
+
+Get-Process Explorer | Select-Object -Property ProcessName -ExpandProperty Modules | Format-List
\ No newline at end of file