#调用vc编写的dll，无法加载 DLL

无法加载 DLL“Mercator.dll”: 由于应用程序配置不正确，应用程序未能启动。重新安装应用程序可能会纠正这个问题。 (异常来自 HRESULT:0x800736B1)。

        [DllImport("Mercator.dll", CharSet = CharSet.Ansi)]
        public extern static void Mercator_Create(string filepath);

        [DllImport("Mercator.dll", CharSet = CharSet.Auto)]
        public extern static void Mercator_Map2Device(int world_left, int world_right, int world_top, int world_bottom, int device_left, int device_right, int device_top, int device_bottom, int device_center_x, int device_center_y, int x, int y, ref int out_x, ref int out_y);

        [DllImport("Mercator.dll", CharSet = CharSet.Auto)]
        public extern static void Mercator_Device2Map(int world_left, int world_right, int world_top, int world_bottom, int device_left, int device_right, int device_top, int device_bottom, int device_center_x, int device_center_y, int x, int y, ref int out_x, ref int out_y);

        [DllImport("Mercator.dll", CharSet = CharSet.Ansi)]
        public extern static void Mercator_Release();

        public Mercator()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                string strPath = Application.ExecutablePath.Substring(0, Application.ExecutablePath.LastIndexOf(@"\")) + "\\mercator.db";
                Mercator_Create(strPath);
                MessageBox.Show("TestSucceed");
            }
            catch
            {
                MessageBox.Show("TestFailure");
            }
        }

请高手帮帮忙解决一下啊！谢谢了！DLL文件已放在了与EXE同级目录中 --------------------编程问答-------------------- 你看下 strPath 有没有问题。 --------------------编程问答-------------------- CharSet.Auto都改成ansi --------------------编程问答-------------------- up

补充：.NET技术 ,  C#