Here's how to make accent marks when typing...
 
Hold down the ALT key and use the number pad on the right side of keyboard
 

ALT + 168 = ¿

ALT + 173 = ¡ 
ALT + 164 = ñ
ALT + 160 = á
ALT + 130 = é
ALT + 161 = í
ALT + 162 = ó
ALT + 163  = ú

For capital letters with accents hold down the ALT key & use the number pad on the right side of keyboard

ALT + 0193  Á
ALT + 0201  É
ALT + 0205  Í
ALT + 0211  Ó
ALT + 0218  Ú