You are not understanding the purpose of this theard and that read_argv and sizeof/charsmax are different things.
PHP Code:
new array[32]
read_argv(1, array, sizeof(array)) //This one uses sizeof
We use sizeof/charsmax to determinate the length of an array/string etc. charsmax = sizeof -1
So:
PHP Code:
new szString [ 256 ]
sizeof ( szString ) -1 = charsmax ( szString )
You can use both of them, read what bugsy posted.
read_argv is something different, search it on the wiki. It allow you to read an argument from a console comand or something like this.