unit SJChildFrm;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls,
  Forms, Dialogs, StdCtrls, ExtCtrls, Menus;

type

  TSJChildForm = class(TForm)
  private
    FAsChild: Boolean;
    FTempParent: TWinControl;
  protected
    procedure CreateParams(var Params: TCreateParams); override;
    procedure Loaded; override;
  public
    constructor Create(AOwner: TComponent); overload; override;
    constructor Create(AOwner: TComponent; AParent: TWinControl); reintroduce; overload;
    { The method below must be overridden to return either the main menu
      of the form, or nil. }
    function CanChange: Boolean; virtual;
    { The method below must be overridden to return a caption for this form } 
    function GetCaption: string; virtual; //abstract;

  end;

var
  SJChildForm: TSJChildForm;

implementation

{$R *.DFM}
constructor TSJChildForm.Create(AOwner: TComponent);
begin
  FAsChild := False;
  inherited Create(AOwner);
end;

constructor TSJChildForm.Create(AOwner: TComponent; AParent: TWinControl);
begin
  FAsChild := True;
  FTempParent := aParent;
  inherited Create(AOwner);
end;

procedure TSJChildForm.Loaded;
begin
  inherited;
  if FAsChild then
  begin
    align := alClient;
    BorderStyle := bsNone;
    BorderIcons := [];
    Parent := FTempParent;
    Position := poDefault;
  end;
end;

procedure TSJChildForm.CreateParams(var Params: TCreateParams);
Begin
  Inherited CreateParams(Params);
  if FAsChild then
    Params.Style := Params.Style or WS_CHILD;
end;

function TSJChildForm.CanChange: Boolean;
begin
  Result := True;
end;


function TSJChildForm.GetCaption: string;
begin
  Result := Caption;
end;

end.