Show form from string

[Pier]

I have following standard form:

-------------------------

unit Unit4;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics,
  Controls, Forms, uniGUITypes, uniGUIAbstractClasses,
  uniGUIClasses, uniGUIForm;

type
  TUniForm4 = class(TUniForm)
  private
    { Private declarations }
  public
    { Public declarations }
  end;

function UniForm4: TUniForm4;

implementation

{$R *.dfm}

uses
  MainModule, uniGUIApplication;

function UniForm4: TUniForm4;
begin
  Result := TUniForm4(UniMainModule.GetFormInstance(TUniForm4));
end;

end.

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is it possible to display the form, instead of using Form4.Show , by calling a function which takes only "Form4" (or "TUniForm4") as argument?

All my attempts have failed so far and any help is most welcome.

Thanks.