Follow the steps to write such hidden codes :-

1. Hold the "Alt" Key down and press the following letter from Numpad(Right Side Buttons).

2. After pressing the Letters "hold off" the alt key.

u see the following code typed.

Alt-0196-------------->
Alt-0128-------------->
Alt-0197-------------->
Alt-0198-------------->
Alt-0199-------------->
Alt-0200-------------->
Alt-0201-------------->
Alt-0202-------------->
Alt-0203-------------->
Alt-0204-------------->
Alt-0205-------------->
Alt-0206-------------->
Alt-0207-------------->
Alt-0208-------------->
Alt-0209-------------->
Alt-0210-------------->
Alt-0211-------------->
Alt-0212-------------->
Alt-0213-------------->
Alt-0214-------------->
Alt-0215-------------->
Alt-0216-------------->
Alt-0217-------------->
Alt-0218-------------->
Alt-0219-------------->
Alt-0220-------------->
Alt-0221-------------->
Alt-0222-------------->
Alt-0223-------------->
Alt-0224-------------->
Alt-0225-------------->
Alt-0226-------------->
Alt-0227-------------->
Alt-0228-------------->
Alt-0229-------------->
Alt-0230-------------->
Alt-0231-------------->
Alt-0232-------------->
Alt-0233-------------->
Alt-0234-------------->
Alt-0235-------------->

Alt-0236-------------->
Alt-0237-------------->
Alt-0238-------------->
Alt-0239-------------->

Alt-0240
Alt-0241-------------->
Alt-0242-------------->
Alt-0243-------------->

Alt-0244-------------->
Alt-0245-------------->
Alt-0246-------------->
Alt-0247-------------->

Alt-0248-------------->
Alt-0249-------------->
Alt-0250-------------->
Alt-0251-------------->

Alt-0252-------------->
Alt-0253-------------->
Alt-0254-------------->
Alt-0255-------------->
Alt-0129--------------> ?
Alt-0130-------------->
Alt-0131-------------->

Alt-0132-------------->
Alt-0133-------------->
Alt-0134-------------->
Alt-0135-------------->

Alt-0136-------------->
Alt-0137-------------->
Alt-0138-------------->
Alt-0139-------------->

Alt-0140-------------->
Alt-0141--------------> ?
Alt-0142-------------->
Alt-0143--------------> ?

Alt-0144--------------> ?
Alt-0145-------------->
Alt-0146-------------->
Alt-0147--------------> "

Alt-0148--------------> "
Alt-0149-------------->
Alt-0150-------------->
Alt-0151-------------->

Alt-0152-------------->
Alt-0153-------------->
Alt-0154-------------->
Alt-0155-------------->

Alt-0156-------------->
Alt-0157--------------> ?
Alt-0158-------------->
Alt-0159

Alt-0160-------------->
Alt-0161-------------->
Alt-0162-------------->
Alt-0163-------------->

Alt-0164-------------->
Alt-0165-------------->
Alt-0166-------------->
Alt-0167-------------->

Alt-0168-------------->
Alt-0169-------------->
Alt-0170-------------->
Alt-0171-------------->

Alt-0172-------------->
Alt-0173-------------->
Alt-0174-------------->
Alt-0175-------------->

Alt-0176-------------->
Alt-0177-------------->
Alt-0178-------------->
Alt-0179-------------->

Alt-0180-------------->
Alt-0181-------------->
Alt-0182-------------->
Alt-0183-------------->

Alt-0184-------------->
Alt-0185-------------->
Alt-0186-------------->
Alt-0187-------------->

Alt-0188-------------->
Alt-0189-------------->
Alt-0190-------------->
Alt-0191-------------->

Alt-0192-------------->
Alt-0193-------------->
Alt-0194-------------->
Alt-0195-------------->



Numbers Should Be Used From Numpad....