Using the LoadImageFont command, although if you haven't switched to a different font then you're using the default font which 'should' have the entire alphabet.
What happend when you change the code from one of your other letters to print the 's'?
e.g.
mx=(mousex()+10)
if keyhit(key_e)
setcolor 0,255,0
drawtext "S" mousex(),mousey()
movemouse mx,mousey()
endif
Which should print an 's' if you hit the letter 'e'?
Or what about:
mx=(mousex()+10)
if keyhit(key_s)
setcolor 0,255,0
drawtext "E" mousex(),mousey()
movemouse mx,mousey()
endif
Which should draw an 'E' when you press the 'S'?
Do either one of those work, or do they fail as well?
What happend when you change the code from one of your other letters to print the 's'?
e.g.
mx=(mousex()+10)
if keyhit(key_e)
setcolor 0,255,0
drawtext "S" mousex(),mousey()
movemouse mx,mousey()
endif
Which should print an 's' if you hit the letter 'e'?
Or what about:
mx=(mousex()+10)
if keyhit(key_s)
setcolor 0,255,0
drawtext "E" mousex(),mousey()
movemouse mx,mousey()
endif
Which should draw an 'E' when you press the 'S'?
Do either one of those work, or do they fail as well?