param(
    [string]$ProcessName = "python",
    [string]$OutPng = "$env:TEMP\edid-window.png"
)
Add-Type @"
using System;
using System.Runtime.InteropServices;
public class Win32Cap {
    [DllImport("user32.dll")] public static extern bool GetWindowRect(IntPtr h, out RECT r);
    [DllImport("user32.dll")] public static extern bool SetForegroundWindow(IntPtr h);
    public struct RECT { public int Left, Top, Right, Bottom; }
}
"@
Add-Type -AssemblyName System.Drawing
$proc = Get-Process -Name $ProcessName -ErrorAction Stop |
    Where-Object { $_.MainWindowHandle -ne 0 -and $_.MainWindowTitle -like 'EDID*' } |
    Select-Object -First 1
if (-not $proc) { throw "no EDID window found for process '$ProcessName'" }
$hwnd = $proc.MainWindowHandle
[Win32Cap]::SetForegroundWindow($hwnd) | Out-Null
Start-Sleep -Milliseconds 800
$r = New-Object Win32Cap+RECT
[Win32Cap]::GetWindowRect($hwnd, [ref]$r) | Out-Null
$w = $r.Right - $r.Left; $h2 = $r.Bottom - $r.Top
$bmp = New-Object System.Drawing.Bitmap($w, $h2)
$g = [System.Drawing.Graphics]::FromImage($bmp)
$g.CopyFromScreen($r.Left, $r.Top, 0, 0, (New-Object System.Drawing.Size($w, $h2)))
$bmp.Save($OutPng, [System.Drawing.Imaging.ImageFormat]::Png)
$g.Dispose(); $bmp.Dispose()
Write-Output "saved $OutPng ($w x $h2)"