[racket] System tray in win32

Is there any way to make a app with system-tray in racket ? I try to use win32api via ffi/unsafe , but i can not find or overwrite the WindowProc callback function of a top-level-windows 。 How can I do this? Racket Users list: http://lists.racket-lang.org/users

[racket] racket distributed hello-world example error

i run the hello-world example in distributed-lib but got a socket error. here is what i did: 1, i have a pc and a VPS 2, i can login the VPS from the pc without password. (ssh) 3, they both running racket6.1 4,i change localhost to the ip of the vps in hello-world.rkt then i run hell