Changing class in delphi

Hi i have form which is mdichild,

How can i Change class in TForm in run time

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Ferruccio AccalaiSenior developer, analyst and customer assistance Commented:
That's not a class, it's a formstyle

procedure TForm1.FormCreate(Sender: TObject);
  self.FormStyle := fsNormal;
hrvica5Author Commented:
It says cannot make a visible window modal

unit JForm;


  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Grids, DBGrids, JvExStdCtrls, JvEdit, JvDBSearchEdit, CHILDWIN, StdCtrls,
  JvCheckBox, ExtCtrls, Buttons, JvExControls, JvXPCore, JvXPButtons, ADODB, DB;

  TForm =  class(TMDIChild).....  >>>> i want change this in TForm

Ferruccio AccalaiSenior developer, analyst and customer assistance Commented:
That meas that your form descends from a TMDIChild form. You cannot change the ancestor on the fly.

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hrvica5Author Commented:
thank you for your help, at least i knopw that i have to make another form
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