Toolbar Button - ButtonStyle Property
ButtonStyle property makes the button 3D or flat
Member of Toolbar Button (PRIM_SPBN)
Data Type - Enumeration

Details

The ButtonStyle property defines the appearance of the button.

Allowed Values

Enum Value	Description
Button	Borders and colored background
FlatButton	Borders and colored background invisible until mouseover
Separator	Vertical line used to spilt groups of buttons