Basically, minimize your WhatsApp window to tray and let it run on background.
- Make sure you have installed WhatsApp via Microsoft Store
- Run WhatsAppTray.exe
- Wait for WhatsApp window appear
- Minimize WhatsApp, notice that your WhatsApp minimized to tray
- Double click on WhatsApp tray to restore
- There you go, WhatsApp running on background. Have a good day ^w^
- Grab Get-AppxPackage and search for WhatsApp app info
- Run WhatsApp via Explorer.exe
- Active WhatsApp window
- Detect WhatsApp minimize, then hide WhatsApp window and show tray
- Double click tray, then reshow WhatsApp window and re-hide tray
- Exits when WhatsApp exits
- Exits WhatsApp via tray menu
This software is no longer work due to WhatsApp UI update recently. The UI is now using Windows Application Frame Window which is I do able to hide the window but I can't completely hide it as the taskbar icon remains. Detail explanation on stackoverflow.