[[Lepe]]

que traduciendo lo que dice roman resulta.....

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;

type
  TForm1 = class(TForm)
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation
Uses child;
{$R *.dfm}

end.

en el FRMMDI pones el uses child y en la ventana hija, en el mismo sitio, pones "Uses Mdi"


al cerrar la ventana hija....

procedure TForm2.ChildClose(Sender: TObject; var Action: TCloseAction);
begin
  frmmdi.mivariable:= mi valor;
  action := cafree;
end;