WndFromPoint allows you to retrieve information on a window under the mouse pointer.
WndFromPoint  might be useful in situations where apps like Microsoft Spy++ fail because they require you to switch focus first and then drag the selection tool over the window, so you cannot select menus and other temporary popup windows.

WndFromPoint just reads the cursor position and stays always-on-top displaying window info.
WndFromPoint v2.0 features:

• options to filter transparent and layered windows
• option to show application windows only
• press Win+Ctrl+Shift+C to copy window info
• high-DPI aware with per monitor awareness (V2)
• settings are not saved anywhere, it’s portable
• runs on Windows 7 and above

Size: 143 KB
License: Freeware
Requirements:Windows 11|10|8|7
Author’s web link:https://www.ntwind.com/freeware/wndfrompoint.html