gistfile1.txt

#NoEnv  ; Recommended for performance and compatibility with future AutoHotkey releases.
; #Warn  ; Enable warnings to assist with detecting common errors.
SendMode Input  ; Recommended for new scripts due to its superior speed and reliability.
SetWorkingDir %A_ScriptDir%  ; Ensures a consistent starting directory.
Gui, Add, Text,, Only play/reads/passed in A:
Gui, Add, Edit, gGetTotal vONlyA
Gui, Add, Text,, Only play/reads/passed in B:
Gui, Add, Edit, gGetTotal vOnlyB
Gui, Add, Text,, Play/read/passed in Both:
Gui, Add, Edit, gGetTotal vBC
Gui, Add, Text,, Play/read/passed in None:
Gui, Add, Edit, gGetTotal vnone
Gui, Add, Text, vTotalText, Total: %Total%
Gui,Add,Button,x560 y20 w80 h30,Okay
Gui, Show, center
Return ; end autoexecute

ButtonOkay:
  Gui, Submit
  Total := none + ONlyA + ONlyB + BC
  GuiControl, Text, TotalText, Total: %Total%
return
 
GetTotal:
  Gui, Submit, NoHide
  Total := none + ONlyA + ONlyB + BC
  GuiControl, Text, TotalText, Total: %Total%
return