如何在AutoHotkey中传播变量？

globalVar := "Hello World"

Func1()
{
    MsgBox % globalVar
}

Func2()
{
    globalVar := "New Value"
    MsgBox % globalVar
}

Func1()
Func2()

Func1("Hello World")

Func1(var)
{
    MsgBox % var
}

result := Func1()

Func1()
{
    return "Hello World"
}

globalObj := {}

Func1()
{
    globalObj.var := "Hello World"
}

Func2()
{
    MsgBox % globalObj.var
}

Func1()
Func2()