procedure RegisterClasses(AClasses: array of TPersistentClass);
function FindClass(const ClassName: string): TPersistentClass;
function GetClass(const AClassName: string): TPersistentClass;
unit Unit2;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm2 = class(TForm)
Edit1: TEdit;
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form2: TForm2;
implementation
{$R *.dfm}
procedure TForm2.Button1Click(Sender: TObject);
var
myRef: TControlClass;
testControl: TControl;
begin
//返回类型是一个类引用
myRef := TControlClass(Classes.GetClass(edit1.Text));
testControl := TControl(myRef.Create(self));
testControl.Parent := self;
testControl.Top := 20;
testControl.Left := 20;
testControl.Show;
end;
//程序运行时就执行
initialization
//注册类
Classes.RegisterClasses([TIcon, TMemo, TButton,TMemo,TLabel]);
//程序关闭时执行
finalization
//删除注册的类
Classes.UnRegisterClasses([TIcon, TMemo, TButton,TMemo,TLabel]);
end.