Activate an AppX program by name

RunAppXProgram.ps1

param($AppXID)
$AppXPackage = Get-AppxPackage $AppXID
$AppXManifest = Get-appxpackagemanifest $AppXPackage
$AppXModelID = $AppXPackage.PackageFamilyName + "!" + $AppXManifest.package.applications.application.id

$csharp = @"
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace RunAppX
{
  [ComImport, Guid("2e941141-7f97-4756-ba1d-9decde894a3d"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
  public interface IApplicationActivationManager
  {
    IntPtr ActivateApplication([In] String appUserModelId, [In] String arguments, [In] UInt32 options, [Out] out UInt32 processId);
  }
  [ComImport, Guid("45BA127D-10A8-46EA-8AB7-56EA9078943C")]
  public class ApplicationActivationManager : IApplicationActivationManager
  {
    [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
    public extern IntPtr ActivateApplication([In] String appUserModelId, [In] String arguments, [In] UInt32 options, [Out] out UInt32 processId);
  }
}
"@
Add-Type -TypeDefinition $csharp
$Manager = new-object RunAppX.ApplicationActivationManager
$Manager.ActivateApplication($AppXModelID, $null, 0, [ref]0) | Out-Null