file creation naming

[Kevin]

i am trying this 4 example as a code
but i get::::Error (RT) in Function1: cannot open or create file: The system cannot find the path specified.
str a b
str ft.time("$desktop$\test\%m-%d-%y")
mkdir(ft)
a="this is the file contents"
b.getwintext(win("Instant Message" "YSearchMenuWndClass")); err
b.from("$desktop$\test\" ft "\" b ".txt")
out b
a.setfile(b)