When an accessibility client (such as a screen reader) requires help information from a Control, it raises the QueryAccessibilityHelp event, to allow you to provide custom help information. This class encapsulates the data for this event.

You should set the HelpNamespace (the URI of the help file), the HelpKeyword (the topic ID within that file, as a string), and the HelpString (the What's This? help information) for the control on which help is requested.

public class QueryAccessibilityHelpEventArgs : EventArgs {
// Public Constructors
   public QueryAccessibilityHelpEventArgs();
   public QueryAccessibilityHelpEventArgs(string helpNamespace, string helpString, string helpKeyword);
// Public Instance Properties
   public string HelpKeyword{set; get; }
   public string HelpNamespace{set; get; }
   public string HelpString{set; get; }
}

Hierarchy

System.Object System.EventArgs QueryAccessibilityHelpEventArgs

Passed To

QueryAccessibilityHelpEventHandler.{BeginInvoke(), Invoke()}