Trying to call this function which i found in the documentation of Quest but i only get the massage that the function not exists.

I included the Core library. Any ideas?

The documentation is kind of misleading. It reads like the function has no return type, and so you might imagine this would work:

s = "  fghjh gjh  "
RTrim(s)
msg(s)

In fact, it returns a new string, the result of the trimming, so you have t do this:

s = "  fghjh gjh  "
s = RTrim(s)
msg(s)

or this:

s = "  fghjh gjh  "
msg(RTrim(s))

oh ok now i got it. thx for the help... ok that helps for this problem.

But now i want to trim down letters or numbers from a string which is not possible with this U.U is there also a way to do this?

You can always iterate through the string, handling each character in turn.

for (i, 1, LengthOf(s)) {
   c = Mid(s, i, 1)
  // Do stuff with c
}

thank you!