How to create a dll written in c that can be import to fasm?

I created a dll project by using Dev-c++, code is as below:

dll.h

Code:

#ifndef _DLL_H_
#define _DLL_H_

#include <windows.h>

#if BUILDING_DLL
#define DLLIMPORT __declspec(dllexport)
#else
#define DLLIMPORT __declspec(dllimport)
#endif

DLLIMPORT void HelloWorld();
DLLIMPORT int add(int, int);

#endif

dllmain.c

Code:


/* Replace "dll.h" with the name of your header */
#include "dll.h"


DLLIMPORT void HelloWorld()
{
        MessageBox(0,"Hello World from DLL!\n","Hi",MB_ICONINFORMATION);
}

DLLIMPORT int add(int x, int y)
{
        return x+y;
}

BOOL WINAPI DllMain(HINSTANCE hinstDLL,DWORD fdwReason,LPVOID lpvReserved)
{
        switch(fdwReason)
        {
                case DLL_PROCESS_ATTACH:
                {
                        break;
                }
                case DLL_PROCESS_DETACH:
                {
                        break;
                }
                case DLL_THREAD_ATTACH:
                {
                        break;
                }
                case DLL_THREAD_DETACH:
                {
                        break;
                }
        }
        
        /* Return TRUE on success, FALSE on failure */
        return TRUE;
}

libdll1.def

Code:

EXPORTS
    HelloWorld @1
    add @2

Then I got dll1.dll.
I can use this dll correctly with c

Code:

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>

typedef int(*lpAdd)(int, int);
typedef void(*lpHello)(void);
HINSTANCE hDll;
lpAdd add;
lpHello hello;

int main()
{
    hDll = LoadLibrary("dll1.dll");
    add = (lpAdd)GetProcAddress(hDll, "add");
    hello = (lpHello)GetProcAddress(hDll, "HelloWorld");
    printf("Hello dll:%d!\n", add(100, 131));
    hello();
    FreeLibrary(hDll);
    return 0;
}

But when I tried to import it in fasm, the program wouldn't run.

Code:

section '.idata' import data readable writeable
  library kernel32,'KERNEL32.DLL',\
          user32,'USER32.DLL',\
          dll1, 'DLL1.DLL'
      

  include 'api\kernel32.inc'
  include 'api\user32.inc'
  
  import dll1,\
        hello, 'HelloWorld'

What should I do to make it right?