.net - How to set the Taskbar Grouping Icon

Question

When my application opens too many windows the taskbar groups them into one button. Each window has its own icon, but the grouping icon is the default "unknown"-kind icon.

How can I set the grouping icon?

Answer 1

The taskbar group icon can be set in the registry on a per application basis.

For explorer, this would be here:

[HKEY_LOCAL_MACHINESOFTWAREClassesApplicationsexplorer.exe]
"TaskbarGroupIcon"="C:WindowsExplorer.exe,13"