# Function for handling WMI jobs / return values

Function ProcessResult($localResult, $successString, $failureString)

{

   #Return success if the return value is "0"

   if ($localResult.ReturnValue -eq 0)

      {write-host $successString} 

   #If the return value is not "0" or "4096" then the operation failed

   ElseIf ($localResult.ReturnValue -ne 4096)

      {write-host $failureString "  Error value:" $localResult.ReturnValue}

   Else

      {#Get the job object

      $job=[WMI]$localResult.job

      #Provide updates if the jobstate is "3" (starting) or "4" (running)

      while ($job.JobState -eq 3 -or $job.JobState -eq 4)

         {write-host $job.PercentComplete "% complete"

          start-sleep 1

          #Refresh the job object

          $job=[WMI]$localResult.job}

       #A jobstate of "7" means success

       if ($job.JobState -eq 7)

          {write-host $successString}

       Else

          {write-host $failureString

          write-host "ErrorCode:" $job.ErrorCode

          write-host "ErrorDescription" $job.ErrorDescription}

       }

}

# Prompt for the Hyper-V Server to use

$HyperVServer = Read-Host "Specify the Hyper-V Server to use (enter '.' for the local computer)"

# Prompt for the virtual machine to use

$VMName = Read-Host "Specify the name of the virtual machine"

# Prompt for the ISO file to connect

$isoPath = Read-Host "Specify the ISO file to connect to the virtual machine"

# Get the management service

$VMMS = gwmi -namespace root\virtualization Msvm_VirtualSystemManagementService -computername $HyperVServer

# Get the virtual machine object

$VM = gwmi MSVM_ComputerSystem -filter "ElementName='$VMName'" -namespace "root\virtualization" -computername $HyperVServer

# SettingType = 3 ensures that we do not get snapshots

$SystemSettingData = $VM.getRelated("Msvm_VirtualSystemSettingData") | where {$_.SettingType -eq 3}

# Get the first DVD drive in the system

$DVDDrive = $SystemSettingData.getRelated("Msvm_ResourceAllocationSettingData") | where{$_.ResourceType -eq 16} | select -first 1

# Make sure the DVD actually exists

if ($DVDDrive -eq $null) 

   {write-host "No DVD drive exists on that virtual machine"

    exit}

# Check to see if there is already media in the DVD drive

$existingRASD = $SystemSettingData.getRelated("Msvm_ResourceAllocationSettingData") | where {$_.Parent -eq $DVDDrive.__Path}

# If there is media in the drive - eject it

if ($existingRASD) {

   $result1 = $VMMS.RemoveVirtualSystemResources($VM, @($existingRASD))

   ProcessResult $result1 "The DVD drive has been cleared." "Failed to clear the DVD drive."}

# Create a new object for a DVD ISO, connected to the DVD drive

$DVDAllocationCapabilities = (gwmi -computername $HyperVServer -namespace root\virtualization Msvm_AllocationCapabilities `

                              -filter "ResourceType=21 and ResourceSubType='Microsoft Virtual CD/DVD Disk'").__Path.Replace('\', '\\')

$DVDSettingsData = [wmi](gwmi -computername $HyperVServer -namespace root\virtualization Msvm_SettingsDefineCapabilities `

                         -filter "GroupComponent='$DVDAllocationCapabilities' and ValueRange=0").PartComponent

$DVDSettingsData.Connection = @($isoPath)

$DVDSettingsData.Parent = $DVDDrive.__Path

# Add the ISO to the virtual machine

$result2 = $VMMS.AddVirtualSystemResources($VM, $DVDSettingsData.GetText(1))

ProcessResult $result2 "The ISO file has been connected." "Failed to connect the ISO file."