Appendix A: Supported User Interface Elements Reference

This appendix contains information about the system-provided UI elements exposed by Microsoft Active Accessibility in Windows 95, Windows 98, Microsoft Windows NT, Windows 2000, Windows XP, and Windows 2000 Server. This support allows client utilities to get information about system-provided UI elements in applications that do not implement Microsoft Active Accessibility.

Oleacc.dll supports controls that are defined in User32.dll, Comctl32.dll, and Windows UI elements. Specifically, it supports the following types of UI elements (listed by Windows class name).

Windows class name UI element type Windows Vista updates
ListBox List boxes None
Button Push buttons, radio buttons, check buttons, group boxes Split buttons can have zero or more children.
Static Labels None
Edit Text boxes None
ComboBox Combo boxes, drop-down lists None
ScrollBar Scroll bars EVENT_OBJECT_CONTENTSCROLLED is a new event for control that have scrolling functionality but do not include a standard scroll bar as part of the control.
#32768 USER menus None
#32770 USER dialog boxes None
#32771 Alt-tab window Available only in classic mode.
msctls_statusbar32 Status bars None
msctls_progress32 Progress bars New color options for progress bars are not exposed by Microsoft Active Accessibility or Microsoft UI Automation properties.
msctls_hotkey32 Hot key controls None
msctls_trackbar32 Trackbars, sliders None
msctls_updown32 Up-down or spin controls None
SysAnimate32 Animation control None
SysTabControl32 Tab control None
SysHeader32 List view headers None
SysListView32 List view controls None
SysTreeView32 Tree view controls None
SysDateTimePick32 (versions 5 and 6) Date and/or time picker Version 6 of this control in Windows Vista has a native IAccessible implementation.
SysIPAddress32 IP address controls None
tooltips_class32 ToolTips None
ToolbarWindow32 Toolbars None
RICHEDIT, RichEdit20A, RichEdit20W Text fields None
SysMonthCal32 (versions 5 and 6) Month calendar Version 6 of this control in Windows Vista has a native IAccessible implementation.


Although some support for system-provided UI elements is provided by Microsoft Active Accessibility on Microsoft Windows NT 4.0 with service pack 4, this support is limited.

This appendix lists the IAccessible properties and methods that Microsoft Active Accessibility supports for each UI element. Where applicable, the documentation also lists the WinEvents that the UI element triggers and includes additional information about the supported properties and methods. It also includes information about object roles and their supported IAccessible methods and properties.

These details can help client developers avoid making unnecessary calls to unsupported properties and methods. This information also lets server developers know which properties and methods their custom controls should support and which WinEvents their controls should trigger.

Use the information in this appendix as a guide. We strongly suggest that you use the Microsoft Active Accessibility tools to verify expected behavior for UI elements or object roles.

For more information, see the following topics: