独自のハンドラを追加します。(通常、あなたが作成したオブジェクトのコンストラクタでおこないます。):
   GlobalDesignHook.AddHandlerComponentAdded(@YourOnComponentAdded);

 独自のハンドラを取り除きます:
   GlobalDesignHook.RemoveHandlerComponentAdded(@YourOnComponentAdded);

 すべてのハンドラを一度に削除することもできます。たとえば、次の行をオブジェクトのデストラクタに追加するのも良いでしょう。:
   GlobalDesignHook.RemoveAllHandlersForObject(Self);

 // lookup root
 ChangeLookupRoot
   Called when the "LookupRoot" changed.
   The "LookupRoot" is the owner object of the currently selected components.
   Normally this is a TForm.
 // methods
 CreateMethod
 GetMethodName
 GetMethods
 MethodExists
 RenameMethod
 ShowMethod
   Called
 MethodFromAncestor
 ChainCall
 // components
 GetComponent
 GetComponentName
 GetComponentNames
 GetRootClassName
 ComponentRenamed
   Called when a component was renamed
 ComponentAdded
   Called when a new component was added to the LookupRoot
 ComponentDeleting
   Called before a component is freed.
 DeleteComponent
   Called by the IDE to delete a component.
 GetSelectedComponents
   Get the current selection of components.
 // persistent objects
 GetObject
 GetObjectName
 GetObjectNames
 // modifing
 Modified
 Revert
 RefreshPropertyValues

 HelpDB:=TFPDocHTMLHelpDatabase(
    HelpDatabases.CreateHelpDatabase('ANameOfYourChoiceForTheDatabase',
                                            TFPDocHTMLHelpDatabase,true));
 HelpDB.DefaultBaseURL:='http://your.help.org/';

 FPDocNode:=THelpNode.CreateURL(HelpDB,
                  'Package1 - A new package',
                  'file://index.html');
 HelpDB.TOCNode:=THelpNode.Create(HelpDB,FPDocNode);// once as TOC
 DirectoryItem:=THelpDBISourceDirectory.Create(FPDocNode,'$(PkgDir)/lcl',
                                 '*.pp;*.pas',false);// and once as normal page
 HelpDB.RegisterItem(DirectoryItem);