; ==== Hold space for shift, or release for space ====
WaitSpace()
{
   KeyWait, Space
   send {LShift up}
   Return
}
Space::
   send {LShift down}
   WaitSpace()
   Return
Space up::
   send {LShift up}
   if instr(A_PriorKey, "Space")
      Send {Space}
   Return
; ====================================================