#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_UseUpx=y
#AutoIt3Wrapper_AU3Check_Stop_OnWarning=y
#AutoIt3Wrapper_Run_Tidy=y
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****

; This works very very well.  Low CPU.  All you have is the exe in memory for each thread.

; Send messages anyway you need.  Try the iniwrite()/iniread(), regwrite()/regread, or fancy  _NamedPipes.

#include <WinAPI.au3>
#include <MsgBoxConstants.au3>
#include <Array.au3>
#include <WinAPIShPath.au3>
#include <Misc.au3>

If $CmdLine[0] > 0 Then
	If $CmdLine[1] = "MyFuncThread1" Then MyFuncThread1()
	If $CmdLine[1] = "MyFuncThread2" Then MyFuncThread2()
	If $CmdLine[1] = "MyFuncThread3" Then MyFuncThread3()
EndIf

If @Compiled Then
	ShellExecute(@AutoItExe, "MyFuncThread1")
	ShellExecute(@AutoItExe, "MyFuncThread2")
	ShellExecute(@AutoItExe, "MyFuncThread3")
Else
	ShellExecute(@ScriptName, "MyFuncThread1")
	ShellExecute(@ScriptName, "MyFuncThread2")
	ShellExecute(@ScriptName, "MyFuncThread3")
EndIf

;*** WARNING, if your thread returns without exiting - it will respawn.  (Maybe you need that?)

Func MyFuncThread1()
	_Singleton("MyFuncThread1", 0)
	MsgBox(0, "", "Thread 1", 0)
	Exit
EndFunc   ;==>MyFuncThread1

Func MyFuncThread2()
	_Singleton("MyFuncThread2", 0)
	MsgBox(0, "", "Thread 2", 0)
	Exit
EndFunc   ;==>MyFuncThread2

Func MyFuncThread3()
	_Singleton("MyFuncThread3", 0)
	MsgBox(0, "", "Thread 3", 0)
	Exit
EndFunc   ;==>MyFuncThread3