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Need GUI'less example of communication between scripts

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I have searched but found nothing for a working example of communication between autoit scripts, but without gui creation. Is it possible?

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Of course - the GUIs are usually there so you can see the sent/received data.  Here are 2 scripts without GUIs - compile both and run the parent:


#include <MsgBoxConstants.au3>
#include "MailSlot.au3"

HotKeySet("{ESC}", "_Exit")

; Create the Mailslot

$sMailSlotName = "\\.\mailslot\trancexxudf"
$hMailSlot = _MailSlotCreate($sMailSlotName)
If @error Then
    MsgBox(48, "MailSlot for Label_Master", "Failed to create account!")

; Run child
ShellExecute("MailSlot_Child.exe", $sMailSlotName)

While 1
    ; Is there a message?
    Local $iSize = _MailSlotCheckForNextMessage($hMailSlot)
    If $iSize Then
        ; If so then read it
        $sMessage = _MailSlotRead($hMailSlot, $iSize, 1)
        ; Announce content
        MsgBox($MB_SYSTEMMODAL, "Message from Parent", "Received: " & $sMessage)


Func _Exit()


#include <MsgBoxConstants.au3>
#include "MailSlot.au3"

If $CmdLine[0] = 0 Then Exit

; Read MailSlot name
$sMailSlotName = $CmdLine[1]

; Start timer
$nBegin = TimerInit()

While 1

    If TimerDiff($nBegin) > 20 * 1000 Then
        ; Random uppercase letter
        $sMessage = Chr(Random(65, 90, 1))
        ; Announce sending
        MsgBox($MB_SYSTEMMODAL, "Message from Child", "Sending: " & $sMessage)
        ; Send
        _MailSlotWrite($sMailSlotName, $sMessage)
        ; Reset timer
        $nBegin = TimerInit()

    If Not ProcessExists("MailSlot_Parent.exe") Then


Keep the same names as I have hard-coded them for simplicity. You will obviously also need trancexx's MailSlot UDF:



Public_Domain.png.2d871819fcb9957cf44f4514551a2935.png Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind

Open spoiler to see my UDFs:


ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area


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You can also create message only windows using the CreateWindowEx api.  But that may be more useful in multi-thread programs.  May work with a timer but I haven't tried it.  I used it as a scheme to pass the command line to the primary instance of a program with WM_COPYDATA.  But there are lots of IPC you can use.  Windows does a lot with named memory mapped files.  If you can pass your data with a single page of memory then you can map the file using the page file as backing, rather than creating an actual disk file, even if the system has no paging file(virtual memory set to 0.)  Windows must make a temp file under the covers or just remap it to some memory in the system.  I don't know how it does it but I tried it and it does work.

Just rambling on.  :)


Edited by MilesAhead

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