To write the 0fb005f30fb003b00290040006300720079002c002000740065006100720073 Sad Symbol Smiley Face symbol on keyboard using ALT codes; ALT+4.6538380674043E+78, just hold down the ALT key while typing the alt key code 4.6538380674043E+78. You have to use the numeric keypad of your keyboard. If you don not have numeric keypad, hold down the Fn and ALT keys while typing the alt code number.