how to use default checkbox icon in WPF?

I want to use the default checkbox icon in ribbonpage.barcheckitem, o can set its Glyph attribute to set its image, but i want to use the default checkbox icon, i thought if i don;t set the Glyph attribute,it will use default checkbox icon as its style, but the result is no icon showde, so i want to know what is the image url of default checkbox icon,so i can use this like:

<dxb:BarCheckItem Glyph="http://packapplication:,,,/Resources/img/ui/view.png"/>

Just use its image url to replace the Glyph value.

Anyone knows can help me solve this problem,thanks!