[Shaun]

Not quite...

onwall2(x,y,width,height) returns a boolean value (true or false value).

So if you wanted to see if the left side of a player was blocking, for example, it would look something like this:

if (onwall2(player.x,player.y+1,1/16,2)==true) {
player.blockleft = true;
}
else {
player.blockleft = false;
}