STD not working

I get notta when i try the example below, am I being an idiot or is this just completely wrong?

in.bmx

Local Proc:TProcess = CreateProcess("out.exe", 1)
		Delay 1000
TerminateProcess Proc
Proc.Close()
	
Print ReadStdin$()

Input
End

out.bmx

WriteStdout "Hello 'in'"