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Support Provided on Windows NT 4.0

  • Article

Active Accessibility provides the same support for common controls defined in Comctl32.dll on Windows NT 4.0 SP6 as it does on Windows 95 and Windows 98.

Support for other system-provided UI elements on Windows NT 4.0 SP4 is limited. In general, any control defined in User32.dll is not fully supported. Very few WinEvents are triggered for these controls, which makes obtaining an IAccessible interface pointer difficult. While some of the controls support some IAccessible properties and methods, the following system-provided UI elements are not supported at all:

  • Combo boxes
  • Menus
  • Scroll bars
  • Task switch window
  • Title bars

Although clients obtain an IAccessible interface pointer to these objects, the IAccessible properties and methods for these objects return an error or return generic information about the object based on the window class name.