The default Outlook XP™ style

The Visual Studio™ style introduced in Version 1.1.0

Drag and Drop introduced in Version 1.1.0

The Office XP™ style and ClearType support in Version 1.2.0
 

Gradient background fills in Version 1.2.0

Windows XP Silver Theme in Version 1.2.0

Windows XP Olive Theme in Version 1.2.0

Windows XP Blue Theme in Version 1.2.0