Sorry for the late reply. You can remove windows' buttons by using the corresponding properties:
CloseMode="None", PinMode="NoPin", ResizeMode="NoResize"
You can remove the border by this setting: BorderThickness="0"
, but there is no property to remove the header of the window. It can be removed only by editing the template. You can do that in blend by selecting the RadWindow then right click and chose "Edit Template" option.
Let me know if you need additional info.
the Telerik team
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