I try with invisible tbuttons like in my other forms, you know the others

.. but nothing,, i try with botva buttons and nothing,, and i try making a form like my detect installation form in that way:
function ShowOptionsForm: TModalResult;
var
OptionsLabel, RepairButtonLabel, UninstallButtonLabel, OptionsCancelLabel: TLabel;
RepairButton, UninstallButton, OptionsCancelButton: TNewButton;
begin
Result := mrNone;
OptionsForm := CreateCustomForm;
try
etc
etc
But nothing seems to work.
The botva butons showing correctly but seems not to aply mrCancel and mrOk.