Hi Monika,
Thank you for using Syncfusion products.
You can use
ShowFloatWindowInTaskbar property and
ShowInTaskbar attached property of DockingManager to show the float windows in Taskbar and these properties are available from our
2016 volume 2 release. Float windows can be shown in Taskbar only if
UseNativeFloatWindow is set to true for DockingManager. ShowFloatWindowInTaskbar property is used to show all the available float windows in Taskbar. ShowInTaskbar attached property is used to show/hide that particular float window in Taskbar. We have prepared a sample for the same and you can download it from the following link:
Sample:
DockingManagerFloatWindowInTaskBarRegards,
Jessie