winutil/functions/public/Invoke-WPFFeatureInstall.ps1

function Invoke-WPFFeatureInstall {
    <#

    .SYNOPSIS
        Installs selected Windows Features

    #>

    if($sync.ProcessRunning) {
        $msg = "[Invoke-WPFFeatureInstall] Install process is currently running."
        [System.Windows.MessageBox]::Show($msg, "Winutil", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Warning)
        return
    }

    $handle = Invoke-WPFRunspace -ScriptBlock {
        $Features = $sync.selectedFeatures
        $sync.ProcessRunning = $true
        if ($Features.count -eq 1) {
            Invoke-WPFUIThread -ScriptBlock { Set-WinUtilTaskbaritem -state "Indeterminate" -value 0.01 -overlay "logo" }
        } else {
            Invoke-WPFUIThread -ScriptBlock { Set-WinUtilTaskbaritem -state "Normal" -value 0.01 -overlay "logo" }
        }

        $x = 0

        $Features | ForEach-Object {
            Invoke-WinUtilFeatureInstall $Feature
            $X++
            Invoke-WPFUIThread -ScriptBlock { Set-WinUtilTaskbaritem -value ($x/$CheckBox.Count) }
        }

        $sync.ProcessRunning = $false
        Invoke-WPFUIThread -ScriptBlock { Set-WinUtilTaskbaritem -state "None" -overlay "checkmark" }

        Write-Host "==================================="
        Write-Host "---   Features are Installed    ---"
        Write-Host "---  A Reboot may be required   ---"
        Write-Host "==================================="
    }
}