dynapackcolf.pas

这是一本关于delphi方面的书籍,其中有一些delphi的实例.

unit DynaPackColF;

interface

uses
  SysUtils, Windows, Messages, Classes, Graphics, Controls,
  Forms, Dialogs, StdCtrls, Buttons, TypInfo;

type
  TForm1 = class(TForm)
    BtnChange: TButton;
    procedure BtnChangeClick(Sender: TObject);
  private
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.BtnChangeClick(Sender: TObject);
var
  FormScroll: TForm;
  FormClass: TFormClass;
  HandlePack: HModule;
begin
  // try to load the package
  HandlePack := LoadPackage ('PackWithForm.bpl');
  if HandlePack > 0 then
  begin
    FormClass := TFormClass(GetClass ('TFormScroll'));
    if Assigned (FormClass) then
    begin
      FormScroll := FormClass.Create (Application);
      try
        // initialize the data
        SetPropValue (FormScroll, 'SelectedColor', Color);
        // show the form
        if FormScroll.ShowModal = mrOK then
          Color := GetPropValue (FormScroll, 'SelectedColor');
      finally
        FormScroll.Free;
      end;
    end
    else
      ShowMessage ('Form class not found');
    UnloadPackage (HandlePack);
  end
  else
    ShowMessage ('Package not found');
end;

end.