How to make the script stop?

[twend]

It's now endless loop I think and I want function that stops the script by pressing a hotkey.

[BrewManNH]

Define "stops". Do you mean exits the script, or exits the endless loop, or pauses the script, or whatever else you might mean by 'stops the script'?

[oapjr]

HotKeySet('{ESC}','_Quit')

While 1
    Sleep(1000)
WEnd

Func _Quit()
    Exit
EndFunc

Or

HotKeySet('{ESC}','_Quit')

$bLoop = True

While $bLoop
    Sleep(1000)
WEnd

Func _Quit()
    $bLoop = False
EndFunc

[twend]

Well pressing a hotkey would stop the script? 

[czardas]

Global $g_bFlag = False

HotKeySet('{ESC}','_Continue')

While 1
    Sleep(100)
    If $g_bFlag Then ExitLoop
WEnd

MsgBox(0, "", "Script is still running")

Func _Continue()
    $g_bFlag = True
    HotKeySet('{ESC}') ; Unset the hotkey if you like.
EndFunc

[BrewManNH]

Well pressing a hotkey would stop the script? 

You still didn't answer the question as to what YOU mean by stop the script.

[TheSaint]

Just pull the plug out .... works for me.

If that doesn't work, then a brick never fails.

Seriously though, I can think of at least a dozen ways to exit your loop or script, but when I tried to troubleshoot the code you provided, I drew a blank.

Please help us to help you!