To make the control even easier to work with, we have provided a set of built-in icons that can be
displayed on the button.
Simply set the predefined CSS class to the PrimaryIconCssClass or/and SecondaryIconCssClass
property. All of the predefined classes are shown in the example
and can be used for reference.
For example, setting PrimaryIconCssClass='rbOk' will render the embedded OK icon on the
left side of the button control.
Tip: You can see how the icons are ordered in the image sprite and get their respective
positions here:
Image Sprite. The icons
background positions are defined in the base stylesheet of Telerik RadButton control.