Dafür gibt es einige Lösungen. Suche mal im Englischen Forum nach Intercsript Communication, da solltest du fündig werden.
Bsp (Skripte natürlich noch trennen):
;Script2 -> Sender
#include "MessageHandler.au3"
$Local_ReceiverID_Name = "Script2sReceiverID";This is the ID that the other script will use to send data
$Remote_ReceiverID_Name = "Script1sReceiverID";This is the ID of the script we want to send data too
$hwnd = _SetAsReceiver($Local_ReceiverID_Name)
ConsoleWrite("hwnd of the Local_ReceiverID_Name is " & $hwnd & @crlf)
$myFunc = _SetReceiverFunction("_MyFunc2")
ConsoleWrite("My data receiver function is " & $myFunc & @crlf)
$Str = InputBox(@ScriptName," I am " & @ScriptName & @crlf & "Enter some data to be sent to the other script")
[/autoit] [autoit][/autoit] [autoit]$iSent = _SendData($Str,$Remote_ReceiverID_Name)
[/autoit] [autoit][/autoit] [autoit]While 1
sleep(100)
WEnd
Func _MyFunc2($vText)
Msgbox(0,@ScriptName,@ScriptName & " has received a message" & @crlf & $vText)
Exit
EndFunc
;Script1 -> Empfänger
#include "MessageHandler.au3"
$Local_ReceiverID_Name = "Script1sReceiverID";This is the ID that the other script will use to send data
$Remote_ReceiverID_Name = "Script2sReceiverID";This is the ID of the script we want to send data too
$hwnd = _SetAsReceiver($Local_ReceiverID_Name)
ConsoleWrite("hwnd of the Local_ReceiverID_Name is " & $hwnd & @crlf)
$myFunc = _SetReceiverFunction("_MyFunc2")
ConsoleWrite("My data receiver function is " & $myFunc & @crlf)
While 1
Sleep(1000)
WEnd
Func _MyFunc2($vText)
Msgbox(0,@ScriptName,"I am " & @ScriptName & " I have received some data" & @crlf & @crlf & $vText & @crlf & @crlf & "And now I'm sending the data back")
$iSent = _SendData($vText,$Remote_ReceiverID_Name)
Exit
EndFunc
nuts. Da fehlt noch die Messagehandler.au3 
Ja, wollte den Server schonen (der hats ja grad eh schwer).
Müsste doch hier oder im englischen Forum zu finden sein?
Die Messagehandler.au3 arbeitet auch mit WM_Copydata.
Das funtkioniert eigentlich sehr gut.
CoProc.au3 kann ich nicht einschätzen.
