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Docs > VCL Controls > Express Cross Platform Library > Concepts > Accessibility Support
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V23.2
VCL Controls
ExpressQuantumGrid Suite
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Accessibility Support
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Built-in Fading Animation
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Example TcxPropertiesStore.StoreTo
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Using the cxPropertiesStore Component
How To...
API Reference
ExpressRichEditControl Suite
ExpressSkins Library
ExpressScheduler Suite
ExpressSpreadSheet Suite
ExpressQuantumTreeList Suite
ExpressPDFViewer Suite
ExpressPrinting System
ExpressLayoutControl Suite
ExpressNavBar Suite
ExpressPivotGrid Suite
ExpressVerticalGrid Suite
ExpressDocking Library
ExpressMemData
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ExpressSpellChecker Suite
ExpressMapControl Suite
ExpressGanttControl Suite
ExpressGaugeControl Suite
ExpressTileControl Suite
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ExpressOrgChart Suite
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ExpressWizardControl Suite

Accessibility Support

This topic describes technologies that VCL controls use to support accessibility features.

Microsoft Active Accessibility

Microsoft Active Accessibility (MSAA) is a COM-based technology that uses applications for Microsoft Windows to improve the accessibility aids. This technology is available for controls in the following VCL libraries:

Each control in these libraries creates MSAA tree nodes that expose the UI structure and other information to third-party accessibility applications. A screen-reading app (for example, Microsoft Narrator) reads information from these nodes when a user navigates between UI elements.

Microsoft UI Automation

Microsoft UI Automation (UIA) is an accessibility framework designed to exchange information between UI elements and third-party accessibility tools. This framework is available in controls from the ExpressEditors library. These controls create UIA tree nodes that allow third-party accessibility applications (such as Microsoft Narrator) to obtain UI information for users and interact with UI elements programmatically.