Data update

Task/Fork/Batch-File/fork-1.bat

@@ -0,0 +1,49 @@
+@echo off
+
+if "%1" neq "" goto %1 || echo Not a valid subroutine
+
+echo Starting mySubroutine1
+start "" "%~n0" mySubroutine1
+echo.
+
+echo Starting mySubroutine2 6 3
+start "" "%~n0" mySubroutine2 6 3
+echo.
+
+echo Starting mySubroutine3
+start "" "%~n0" mySubroutine3
+echo.
+
+:: We wait here for the subroutines to run, but they are running asynchronously
+timeout /t 1
+
+for /l %%i in (1,1,3) do (
+	for /f "tokens=*" %%j in (output%%i.txt) do (
+		set output%%i=%%j
+		del output%%i.txt
+	)
+)
+echo.
+echo.
+echo Return values
+echo ----------------------------
+echo mySubroutine1: %output1%
+echo mySubroutine2: %output2%
+echo mySubroutine3: %output3%
+
+pause>nul
+exit
+
+:mySubroutine1
+echo This is the result of subroutine1 > output1.txt
+exit
+
+:mySubroutine2
+set /a result=%2+%3
+echo %result% > output2.txt
+exit
+
+:mySubroutine3
+echo mySubroutine1 hasn't been run > output3.txt
+if exist output1.txt echo mySubroutine1 has been run > output3.txt
+exit

Task/Fork/Batch-File/fork-2.bat

@@ -0,0 +1,13 @@
+@echo off
+setlocal enableextensions
+if defined forked_%~n0 (
+  echo I'm the child
+  pause
+  exit
+) else (
+  title Parent window
+  set forked_%~n0=1
+  start "Child window" %~f0
+  echo I'm the parent.
+  pause
+)