At a larger scale, forms and data modules are generally owned by the property can also be used to access one component owned by another—let's say, a form.This property can be very handy (compared to using a specific component directly) for writing generic code, acting on all or many components at a time. Themes, Influence Panel; type TInfluence Panel Style Hook Color = class(TEdit Style Hook) private procedure Update Colors; protected procedure Wnd Proc(var Message: TMessage); override; public constructor Create(AControl: TWin Control); override; end; type TForm1 = class(TForm) Scroll Box1: TScroll Box; Scroll Box2: TScroll Box; Button1: TButton; Button2: TButton; procedure Button1Click(Sender: TObject); procedure Button2Click(Sender: TObject); private public end; var Form1: TForm1; implementation uses Vcl. Color; end else begin LStyle := Style Services; Brush. Get Style Color(sc Edit Disabled); Font Color := LStyle. Graphics; type TInfluence Panel = class(TPanel) private o Caption Label : TLabel; FLabel Caption : String; procedure Set Label Caption(s Caption : String); protected procedure Paint; override; public constructor Create(AOwner: TComponent); override; property Label Caption : string read FLabel Caption write Set Label Caption; published end; procedure Register; implementation uses Winapi. Set Label Caption(s Caption: string); begin FLabel Caption := s Caption; if o Caption Label nil then o Caption Label.

To be specific I have extended TPanel and am filling a TScroll Box with dynamically created Panels, setting each to a specific color. Create(AOwner: TComponent); begin inherited; o Caption Label := TLabel. Your Style hook has not effect in the paint process because The TPanel doesn't use a style hook to draw the control, try the answer to this question How i can change the color of a TPanel with the Vcl Styles enabled? I thought the purpose of the hook in this case was to ignore the application of the style so I could use the default properties instead.

I also use the API to suspend redraws on the Scroll Box during the creation process. Create(Self); with o Caption Label do begin Caption := 'Caption'; Top := 0; Left := 0; Align := al Top; Word Wrap := True; Parent := Self; end; end; procedure TInfluence Panel.

Create(AOwner: TComponent); begin inherited; o Caption Label := TLabel.

class defines many core elements of components; however, it is not as complex as you might think, because the base classes and the language already provide most of what's needed.

In these circumstances you only need to remember to destroy the component containers (form or data module) when they are not needed anymore, and you can forget about the components they contain.

For example, you delete a form to destroy all the components it contains at once, which is a major simplification compared to having to remember to free each and every object individually.When the loading is complete, I am left with TPanels set to cl Window (visually) but when I drag and drop the TPanel to another location/control the colors I set in code "kick in". Set Label Caption(s Caption: string); begin FLabel Caption := s Caption; if o Caption Label This is the simple project that should show the issue. So something is not letting/allowing those colors to apply... So I'm not quite sure if there is a "refresh" I need to call with VCL Style overrides on dynamic component creation, or if the suspension of redraws on TScroll Box are causing interference with the color not updating on the Panel when created.. I'm wondering if there is just a simple & known "gotcha" I am overlooking with what I am trying to do. Button 1 loads five instances of the TInfluence Panel into Scroll Box1. Several public methods and properties of the class are devoted to handling the two sides of ownership.Here is a list, extracted from the class declaration (in the Classes unit of the VCL): type TComponent = class(TPersistent, IInterface, IInterface Component Reference) public constructor Create(AOwner: TComponent); virtual; procedure Destroy Components; function Find Component(const AName: string): TComponent; procedure Insert Component(AComponent: TComponent); procedure Remove Component(AComponent: TComponent); property Components[Index: Integer]: TComponent read Get Component; property Component Count: Integer read Get Component Count; property Component Index: Integer read Get Component Index write Set Component Index; property Owner: TComponent read FOwner;.In Delphi XE2 I have successfully created overrides for the VCL Styles for a custom component class I have created. Button2Click(Sender: TObject); var i Panel : Integer; begin for i Panel := Scroll Box1. Refresh, etc don't seem to change Influence Panel; interface uses System.