How do I check if AutoIt3 executable is already running?

Question

After compiling my AutoIt v3 script into an EXE executable, I want to ensure that only one instance can be run at a time. What's the best way to achieve this?

Answer 1

What you need is a _Singleton

#include <Misc.au3>
#include <MsgBoxConstants.au3>

If _Singleton("test", 1) = 0 Then
    MsgBox($MB_SYSTEMMODAL, "Warning", "An occurrence of test is already running")
    Exit
EndIf
MsgBox($MB_SYSTEMMODAL, "OK", "the first occurrence of test is running")