AutoHotKey script to switch layouts with CapsLock key on Windows

CapsLock.ahk

#NoEnv
#SingleInstance force

SendMode Input

CapsLock::SwitchNextLayout()
+CapsLock::SetCapsLockState % !GetKeyState("CapsLock", "T") 
;SetCapsLockState, AlwaysOff

SwitchNextLayout()
{
    ControlGetFocus, ctl, A
    SendMessage, 0x50, 2, 0, %ctl%, A ; WM_INPUTLANGCHANGEREQUEST, INPUTLANGCHANGE_FORWARD (0x2)
}