The DevExpress ASP.NET Tree List control (ASPxTreeList) is designed to comply with Section 508 Standards and W3C's latest accessibility recommendations such as WCAG (2.0) and WAI-ARIA (1.0). As most of DevExpress ASP.NET controls, ASPxTreeList implements the AccessibilityCompliant property, which allows more accessible markup to be generated for the control.
This demo illustrates how to make the ASPxTreeList control more accessible for end-users by enabling the AccessibilityCompliant property and defining a caption through the Caption property.
Check ASPxTreeList's accessibility level in this demo by clicking the Validate with WAVE link and running WAVE (a web accessibility evaluation tool). Note that ASPxTreeList can look and operate correctly when the High Contrast mode is enabled in Windows OS.
To learn more on accessibility support in DevExpress ASP.NET controls, please view the Section 508 and Accessibility and Accessibility Support topics.