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test-ppt.ps1

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+Add-Type @"
+using System;
+using System.Runtime.InteropServices;
+using System.Collections.Generic;
+
+public class Win32Helper {
+    public delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam);
+
+    [DllImport("user32.dll")]
+    public static extern bool EnumWindows(EnumWindowsProc enumProc, IntPtr lParam);
+
+    [DllImport("user32.dll")]
+    public static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);
+
+    [DllImport("user32.dll")]
+    public static extern bool IsWindowVisible(IntPtr hWnd);
+
+    [DllImport("user32.dll", CharSet = CharSet.Auto)]
+    public static extern int GetWindowTextLength(IntPtr hWnd);
+
+    [DllImport("user32.dll", CharSet = CharSet.Auto)]
+    public static extern int GetWindowText(IntPtr hWnd, System.Text.StringBuilder lpString, int nMaxCount);
+
+    public static List<IntPtr> GetProcessWindows(uint processId) {
+        List<IntPtr> windows = new List<IntPtr>();
+        EnumWindows(delegate(IntPtr hWnd, IntPtr lParam) {
+            uint id;
+            GetWindowThreadProcessId(hWnd, out id);
+            if (id == processId && IsWindowVisible(hWnd) && GetWindowTextLength(hWnd) > 0) {
+                windows.Add(hWnd);
+            }
+            return true;
+        }, IntPtr.Zero);
+        return windows;
+    }
+    
+    public static string GetWindowTextStr(IntPtr hWnd) {
+        int length = GetWindowTextLength(hWnd);
+        if (length == 0) return "";
+        System.Text.StringBuilder builder = new System.Text.StringBuilder(length + 1);
+        GetWindowText(hWnd, builder, builder.Capacity);
+        return builder.ToString();
+    }
+}
+"@
+
+$ppts = Get-Process -Name "wpp", "POWERPNT", "wps" -ErrorAction SilentlyContinue
+foreach ($p in $ppts) {
+    Write-Host "Process $($p.Id) $($p.ProcessName)"
+    $hwnds = [Win32Helper]::GetProcessWindows($p.Id)
+    foreach ($hwnd in $hwnds) {
+        $title = [Win32Helper]::GetWindowTextStr($hwnd)
+        Write-Host "  HWND: $hwnd, Title: $title"
+    }
+}