Remapping ctrl+win - autohotkey

Question

The first script works, but the second that should remap ctrl+win does not. Why is that?
ctrl::Send {ALT down}{SHIFT down}{SHIFT up}{ALT up}
^lwin::Send {ALT down}{SHIFT down}{SHIFT up}{ALT up}

Answer 1

This works fine for me:
Ctrl & LWin:: msgbox hi
I think the keys Alt and Shift are triggering while you still have not released the keys Ctrl and Win, therefore it’s working all the keys at the same time: Alt, Shift, Ctrl, Win.
Because you just should check if the keys are not pressed at that time.
To do this, we’ll use the function GetKeyState().
Ctrl & LWin Up::
while(!GetKeyState("Ctrl", "P"))
continue
send {ALT down}{SHIFT down}
sleep 40
send {SHIFT up}{ALT up}
; or use “Send {ALT down}{SHIFT down}{SHIFT up}{ALT up}”
; if it works for you
return

Answer 2

Because they are both modifier keys.
Try this instead:
Ctrl & LWin::
Edit:
Then, try using SetKeyDelay and possibly SendEvent, too.
Wait, I found this working just now:
Ctrl & LWin::Send {ALT down}{SHIFT down}
Ctrl & LWin Up::Send {SHIFT up}{ALT up}
Of course, being modifier keys, they need special treatment.
Edit 2:
My shift+alt combination is for changing the keyboard language
Why didn't you say so earlier? : ) I thought you were just replacing modifier combinations.
It's much simpler, then.
This should work:
/*
cf. https://www.autohotkey.com/docs/commands/PostMessage.htm
cf. https://msdn.microsoft.com/en-us/library/windows/desktop/ms632630(v=vs.85).aspx
0x50: WM_INPUTLANGCHANGEREQUEST
0x02: INPUTLANGCHANGE_FORWARD
*/
Ctrl & LWin::PostMessage, 0x50, 2,,, A
Alternatively:
Ctrl & LWin::
KeyWait Ctrl
KeyWait LWin
PostMessage, 0x50, 2,,, A
Return
The above two pieces of code have pros and cons. Experiment and choose what suits your needs.