namespace UserActiveXDemo
{
    [ComImport, GuidAttribute("F0031FC7-3560-488E-A2AD-7ABC7D85998C")]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    public interface IObjectSafety
    {
        [PreserveSig]
        void GetInterfacceSafyOptions(
         int riid,
         out int pdwSupportedOptions,
         out int pdwEnabledOptions);

        [PreserveSig]
        void SetInterfaceSafetyOptions(
        int riid,
        int dwOptionsSetMask,
        int dwEnabledOptions);
    }
}

namespace UserActiveXDemo
{
    //guid 可以自己定义
    [Guid("685F0A47-944D-4145-BF4E-76A02A422B02")]
    public partial class UserControl1: UserControl, IObjectSafety
    {
        public UserControl1()
        {
            InitializeComponent();
        }
        public void GetInterfacceSafyOptions(int riid, out int pdwSupportedOptions, out int pdwEnabledOptions)
        {
            throw new NotImplementedException();
        }

        public void SetInterfaceSafetyOptions(int riid, int dwOptionsSetMask, int dwEnabledOptions)
        {
            throw new NotImplementedException();
        }
    }
}

<object 
width="500"
height="100"
codebase="CardReader/SetupCardReader/Debug/Setup.exe"></object>