Read the ProductVersion from a Windows Installer MSI file via PowerShell

Msi.psm1

function Get-MsiProductVersion {

    [CmdletBinding()]
    param (
        [Parameter(Mandatory=$true)]
        [ValidateScript({$_ | Test-Path -PathType Leaf})]
        [string]
        $Path
    )
    
    function Get-Property ($Object, $PropertyName, [object[]]$ArgumentList) {
        return $Object.GetType().InvokeMember($PropertyName, 'Public, Instance, GetProperty', $null, $Object, $ArgumentList)
    }

    function Invoke-Method ($Object, $MethodName, $ArgumentList) {
        return $Object.GetType().InvokeMember($MethodName, 'Public, Instance, InvokeMethod', $null, $Object, $ArgumentList)
    }

    $ErrorActionPreference = 'Stop'
    Set-StrictMode -Version Latest

    #http://msdn.microsoft.com/en-us/library/aa369432(v=vs.85).aspx
    $msiOpenDatabaseModeReadOnly = 0
    $Installer = New-Object -ComObject WindowsInstaller.Installer

    $Database = Invoke-Method $Installer OpenDatabase  @($Path, $msiOpenDatabaseModeReadOnly)

    $View = Invoke-Method $Database OpenView  @("SELECT Value FROM Property WHERE Property='ProductVersion'")

    Invoke-Method $View Execute

    $Record = Invoke-Method $View Fetch
    if ($Record) {
        Write-Output (Get-Property $Record StringData 1)
    }

    Invoke-Method $View Close @()
    Remove-Variable -Name Record, View, Database, Installer

}

No worries @DoublNAT