DLLMain函数如下:

BOOL APIENTRY DllMain( HANDLE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{     switch(ul_reason_for_call)
    {
        case DLL_PROCESS_ATTACH://DLL被加载
            MessageBox(0,"DLL正被加载 !","DllMessage",0);         
            break;
        case DLL_PROCESS_DETACH:
             MessageBox(0,"进程将要退出!","DllMessage",0);
             break;
        default:
             break;
    }
    return TRUE;
}

为什么使用VB调用时DLL会出现"DLL正被加载"提示框,而用C怎么不提示呢?
//c代码
LoadLibrary("MonitorDll.dll");//LoadLibraryA,LoadLibraryW我都试过  返回值是正确的
'vb代码
LoadLibrary("MonitorDll.dll")
为什么使用VB调用时DLL会出现"DLL正被加载"提示框,而用C怎么不提示呢?