"Make game believe it's in foreground"

[vagnue]

Hello. I am trying to use PostMessage to send background clicks to the game Path of Exile. Keyboard clicks work fine but the game seems to completely ignore all mouse events unless the game is in foreground.

I noticed ISBoxer and some bots (like demonbuddy) have an option called "Make game believe it's in foreground", I assume this would solve my problem. Does anyone know how this is implemented? Or where to start looking on how to do it?

[yellowspark]

 private static unsafe void smethod_20()
        {
            void* voidPtr = (void*) stackalloc byte[2];
            if (GlobalSettings.Instance.KeepGameInForeground)
            {
                *((sbyte*) voidPtr) = ZetaDia.Memory.Read<byte>(ZetaDia.Offsets.struct11_0.intptr_0, false) == 1;
                if (*(((sbyte*) voidPtr)) == 0)
                {
                    object obj2; <- #1 object declaration World 
                    Executor executor = ZetaDia.Memory.Executor;
                    *((sbyte*) (voidPtr + 1)) = 0;
                    try
                    {
                        Monitor.Enter(obj2 = executor.AssemblyLock, ref (bool) ref (voidPtr + 1));
                        executor.Clear();
                        executor.AddRandomLine("push 1");
                        executor.AddRandomLine("call {0}", new object[] { ZetaDia.Offsets.struct9_0.intptr_581 });
                        executor.AddRandomLine("add esp, 4");
                        executor.AddRandomLine("retn");
                        executor.Execute(null);
                    }
                    finally
                    {
                        if (*(((sbyte*) (voidPtr + 1))) != 0)
                        {
                            Monitor.Exit(obj2);
                        }
                    }
                }
            }
        }