Uses of Interface

Packages that use HelpCtx.Provider
org.openide Provides ErrorManager - the central place for logging and reproting failures in NetBeans based system. 
org.openide.util.actions There are several types of standard actions that should be used for many user interactions within NetBeans. 
org.openide.util.datatransfer NetBeans uses special extensions to data transfer. 

Uses of HelpCtx.Provider in org.openide

Classes in org.openide that implement HelpCtx.Provider
 class ServiceType
          Deprecated. The prefered way to register and lookup services is now Lookup as described in services registration and lookup page.

Uses of HelpCtx.Provider in org.openide.util.actions

Classes in org.openide.util.actions that implement HelpCtx.Provider
 class BooleanStateAction
          An action that can be toggled on or off.
 class CallableSystemAction
          An action which may be called programmatically.
 class CallbackSystemAction
          Action that can have a performer of the action attached to it at any time, or changed.
 class SystemAction
          A base class for user-visible actions.

Uses of HelpCtx.Provider in org.openide.util.datatransfer

Classes in org.openide.util.datatransfer that implement HelpCtx.Provider
 class NewType
          Describes a type that can be created anew.
 class PasteType
          Clipboard operation providing one kind of paste action.