hi,

at the load event of my form i use the API SendMessage with WM_SETICON to set the 16px icon (ICON_SMALL) for the form and the 32px icon (ICON_BIG) for the taskbar/app-switcher.

If i use the API SendMessage with WM_SETICON & ICON_BIG later during runtime the icon at the windows taskbar doesnt change anymore. But the 32px icon at the app-switcher (ALT+TAB) is changed!

Does anyone know how to change the app icon displayed at the windows taskbar during runtime?