Yet another multi-process library for AutoIt3

• Easy to use
• High performance
• Support IPC, via COM object and message events

Just copy mp.au3 and DLLs from release into your project.

You can build DLL from source, e.g with MSVC:

$ cl /MT /LD /O2 mp.cc user32.lib kernel32.lib oleaut32.lib

We emulate the "fork process" technique with CreateProcess().

// Clone current process
CreateProcess(NULL, GetCommandLine()... CREATE_SUSPENDED

To preload data before initialization, we create process with flag CREATE_SUSPENDED to suspend it. Then inject our DLL to it and write memory. Provide only a single DLL to help hacking memory easier.

static int data;
...
WriteProcessMemory(process, &data, &data, sizeof(data) ...

• data is static and has same base address in different process
• So address data can be... module.dll + &data

On IPC, we provide a simple IDispatch object to manipulate data in main process. In sub processes, we also use hacking memory.

For message events, we just use headless window message and SendMessage().

#NoTrayIcon
#include "mp.au3"

; Initialize.
_MP_Init()

; Get shared data object.
global $oData = _MP_SharedData()

; Check if the process is main.
if _MP_IsMain() then
	main()
else
	sub()
endIf

; Main process.
func main()
	; Set message.
	$oData.message = "Hello bro, I'm here."

	; Fork process.
	local $sub = _MP_Fork()

	; Show message box.
	MsgBox(0, 'Main process', 'Hi guy, sub process.')

	; Wait for sub process exit.
	_MP_Wait($sub)
endFunc

; Sub process.
func sub()
	Sleep(500)
	; Show message data.
	MsgBox(0, 'Sub process', $oData.message)
endFunc