exported DllMain not working

[4zv4l]

Description

I tried to load a dynamic library (dll), when I made it from Linux with the exported DllMain like this

import winim/lean

proc NimMain() {.cdecl,importc.}

proc DllMain(hinstDLL: HINSTANCE, fdwReason: DWORD, lpvReserved: LPVOID) : BOOL
  {.stdcall, exportc, dynlib.} =
  
  if fdwReason == DLL_PROCESS_ATTACH:
    NimMain()
    MessageBox(0, "Hello, world !", "Nim is Powerful", 0)

  return true

it worked just fine
but when I compile it from Windows directly, when I export the DllMain, it does not work (when I just put a simple function in the dll it works, but so when I try to export DllMain, the dll cannot be loaded anymore)

I compile it like this:
nim c --app=lib --nomain .\dll_test.nim

this is the program (main.nim)

import winim/lean
import dynlib

const dll = "./dll_test.dll"

proc main() =
  let hlib = loadLib(dll)
  if hlib == nil:
    echo "could not import: ", dll

  unloadLib(hlib)

main()

Nim Version

nim -v Nim Compiler Version 1.9.1 [Windows: amd64] Compiled at 2023-02-03 Copyright (c) 2006-2023 by Andreas Rumpf

active boot switches: -d:release

Current Output

could not import: ./dll_test.dll

Expected Output

(MessageBox showing Hello World)

Possible Solution

No response

Additional Information

with the same code, cross compiling from Linux it works.