Add-Type -TypeDefinition @'
using System;
using System.Text;
using System.Runtime.InteropServices;
public class WinEnum {
    [DllImport("user32.dll")] static extern bool EnumWindows(EnumProc cb, IntPtr l);
    [DllImport("user32.dll")] static extern int GetWindowText(IntPtr h, StringBuilder s, int n);
    [DllImport("user32.dll")] static extern int GetWindowTextLength(IntPtr h);
    [DllImport("user32.dll")] static extern uint GetWindowThreadProcessId(IntPtr h, out uint pid);
    [DllImport("user32.dll")] static extern bool IsWindowVisible(IntPtr h);
    public delegate bool EnumProc(IntPtr h, IntPtr l);
    public static void Dump(uint targetPid) {
        EnumWindows((h, l) => {
            uint pid; GetWindowThreadProcessId(h, out pid);
            if (pid == targetPid && IsWindowVisible(h)) {
                int len = GetWindowTextLength(h);
                var sb = new StringBuilder(len + 1);
                GetWindowText(h, sb, sb.Capacity);
                Console.WriteLine("  hwnd={0} title='{1}'", h, sb.ToString());
            }
            return true;
        }, IntPtr.Zero);
    }
}
'@
$procs = Get-Process TcXaeShell -ErrorAction SilentlyContinue
if (-not $procs) { Write-Host "no TcXaeShell running"; exit 0 }
foreach ($p in $procs) {
    Write-Host "PID $($p.Id):"
    [WinEnum]::Dump([uint32]$p.Id)
}