RadMultiColumnComboBox provides support for right-to-left presentation.
RadMultiColumnComboBox considers the direction attribute set to the control itself or any parent
HTML element. If you set the direction of the body tag (or any other parent element
that contains the control) to rtl, RadMultiColumnComboBox reverses the
position of the button and aligns the text to the right side of the container.
<telerik:RadMultiColumnComboBox ID="RadMultiColumnComboBox1" runat="server" dir="rtl" ... />