asp.net用短信模块通过串口给手机发送短信

Question

[STAThread]
[DllImport("sms.dll", EntryPoint = "Sms_Connection")]
public static extern uint Sms_Connection(string CopyRight, uint Com_Port, uint Com_BaudRate, out string Mobile_Type, out string CopyRightToCOM);

    [DllImport("sms.dll", EntryPoint = "Sms_Disconnection")]
    public static extern uint Sms_Disconnection();

    [DllImport("sms.dll", EntryPoint = "Sms_Send")]
    public static extern uint Sms_Send(string Sms_TelNum, string Sms_Text);

    [DllImport("sms.dll", EntryPoint = "Sms_Receive")]
    public static extern uint Sms_Receive(string Sms_Type, out string Sms_Text);

    [DllImport("sms.dll", EntryPoint = "Sms_Delete")]
    public static extern uint Sms_Delete(string Sms_Index);

    [DllImport("sms.dll", EntryPoint = "Sms_AutoFlag")]
    public static extern uint Sms_AutoFlag();

    [DllImport("sms.dll", EntryPoint = "Sms_NewFlag")]
    public static extern uint Sms_NewFlag();       

protected void Page_Load(object sender, EventArgs e)
{
protConnection();
}

    public void protConnection()
    {
        String TypeStr="";
        string CopyRightToCOM="";
        String CopyRightStr = "//上海迅赛信息技术有限公司,网址www.xunsai.com//";
     bool   connect = Sms_Connection(CopyRightStr, uint.Parse("3"), 9600, out TypeStr, out CopyRightToCOM) == 1;
        if (connect)
        {
            Log("串口COM3连接成功");
        }
        else
        {
            Log("串口COM3连接失败");
        }
    }


    protected void Button1_Click(object sender, EventArgs e)
    {
        string phone = this.tx2.Text; //发送短信的目标号码
        string message = this.tx1.Text; //短信内容
        Sms_Send(phone, message);
    }

            页面中就一个号码框和一个短信内容文本框，一个发送按钮，sms.dll文件以经放在了system32目录下，启动程序提示：无法加载 DLL“sms.dll”: 找不到指定的模块。
            然后又将sms.dll文件放在了项目bin目录下，以及release和debug目录下，程序干脆就启动不起来了，请大神指点。

Answer 1

你这个应该是win系统吧？看看dll是32位的还是64位，跟你当前的系统一致不？另外找不到路径好像跟环境变量有关，好像有个path里面可以设置。