Description

The context menu command "Open containing folder" (IDM_EDIT_OPENINFOLDER) currently uses ShellExecute to launch explorer.exe /select. This creates a new explorer.exe process each time, which remains in Task Manager even after closing the folder window.

Expected behavior

It should reuse an existing Explorer window (like the main menu command "File -> Open containing folder", which was fixed in PR #17265).

Actual behavior

A new explorer.exe process is spawned each time and lingers.

Steps to reproduce

1. Open any file in Notepad++.
2. Right-click on a file path in the editor and choose "Open containing folder".
3. Close the opened folder.
4. Check Task Manager – an extra explorer.exe process remains.

Additional context

• Related issue: [BUG] New representations of the Windows Explorer application added to Windows Task Manager when folders opened via Notepad++. #17060
• Related PR: Fix opening folder in Explorer way #17265 (fixed IDM_FILE_OPEN_FOLDER but not IDM_EDIT_OPENINFOLDER)
• Community discussion: https://community.notepad-plus-plus.org/topic/27276

I have a fix ready and would like to be assigned to this issue.