text: #pragma once
  
  #include <Windows.h>
  
  #define FUNCTION(r) extern "C" __declspec(dllexport) r __stdcall
  
  FUNCTION(void) initOverlay();
  FUNCTION(void) updateOverlay();
  FUNCTION(HDC) getOverlayDC();
  
  DWORD WINAPI overlayThread(LPVOID parameter);
  DWORD WINAPI overlayWindowThread(LPVOID parameter);
  
  LRESULT CALLBACK WindowProcNoClose(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);