Forums Scripts & Popups Replace letters in written text

Hello how can i Make a script that as I type, whatever I type it replaces some letters with others....

for example:

Remplace Letter O with Ø so when I write "Hello" I wold actually say HellØ

thank you very much

on *:input:*:*:{
if (($left($1,1) == $readini($mircini,text,commandchar)) || ($left($$1,1) == !) || ($left($$1,1) == @) || ($ctrlenter == $true)) { return }
msg $active $replace($$1-,O,0)
haltdef
}
try something like that

this has been covered on the message board here many times
you will find many many examples of input scripts by using the search feature on the message board

Thank you Very much