How to get returning value from c++ to js ?

Question

I've made function in c++ which return value.
i want to access that returning value in js
something like that
js :
var a = window.app.reply ();
alert (a); // it keep showing undefined or null

c++ :
bool reply ()
{
return true;
}

Answer 1

try with xml or json files (od either ordinary text file)
save value in that file and than retrive it from another program.
happy coding