Create Dll C++ in VS 2015 compatible with Inno Setup

[kassane]

HANDLE __stdcall MyHandle(void)
{
  return AppHandler;
}

to:

extern "C" __declspec(dllexport) HANDLE MyHandle(void)
{
  return AppHandler;
}

My Example: using [Inno-Setup 5.5.1 + DLL(MSVC 2017 x86)] Works!

//MyDll.cpp

#pragma once

typedef long int HWND;

extern "C" __declspec(dllexport) HWND Func(void)
{
	return 30*5; //150
}