Starting in Windows 7, applications can display an overlay on the icon in
the taskbar. This class wraps around the native functionality to do this.
Sets the overlay icon and its corresponding alt text.
@note The behavior for window groups is managed by Windows.
- If an overlay icon is set for any window in a window group and another
overlay icon is already applied to the corresponding taskbar button, that
existing overlay is replaced.
- If null is passed in to replace the overlay currently being displayed,
and if a previous overlay set for a different window in the group is
still available, then that previous overlay is displayed.
| statusIcon | The handle to the overlay icon. The icon will be scaled to the small icon size (16x16 at 96 dpi). Can be null, in which case if the taskbar button represents a single window the icon is removed. |
| statusDescription | The alt text version of the information conveyed by the overlay, for accessibility purposes. |