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procedure TFormEinstellungen.SpeedButton1Click(Sender: TObject);
begin
Edit1.Enabled:=False;
Edit2.Enabled:=False;
Edit3.Enabled:=False;
Edit4.Enabled:=False;
Edit5.Enabled:=False;
Edit6.Enabled:=False;
Edit7.Enabled:=False;
Edit8.Enabled:=False;
Edit9.Enabled:=False;
Edit10.Enabled:=False;
Edit11.Enabled:=False;
Edit12.Enabled:=False;
Edit13.Enabled:=False;
Edit14.Enabled:=False;
Edit15.Enabled:=False;
Edit16.Enabled:=False;
Edit17.Enabled:=False;
Edit18.Enabled:=False;
Edit19.Enabled:=False;
Edit20.Enabled:=False;
Edit1.Enabled:=True;
end;					

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procedure disableControls(parent:TWinControl);
var i:integer;
begin
  for i:=0 to parent.controlcount-1 do
  begin
    if parent.controls[i] is TEdit then
      (parent.Controls[i] as TEdit).enabled:=false;
    if parent.controls[i] is TWinControl then
      disableControls(parent.controls[i] as TWinControl);
  end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  disableControls(self);
end;