程序代碼如下所示:

using System;
using System.Runtime.InteropServices;
namespace d4htmlinterface
{
    /**//// <summary>
    /// Class1 的摘要說明。
    /// </summary>
    public class htmlinterface
    {
      public htmlinterface()
       {
        //
        // TODO: 在此處添加構造函數邏輯
        //
       }
     [StructLayout(LayoutKind.Sequential,CharSet=CharSet.Unicode)]
    public struct OLECMDTEXT
    {
        public uint cmdtextf;
        public uint cwActual;
        public uint cwBuf;
        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=100)]public char rgwz;
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct OLECMD
    {
        public uint cmdID;
        public uint cmdf;
    }

    // Interop definition for IOleCommandTarget.
    [ComImport,
    Guid("b722bccb-4e68-101b-a2bc-00aa00404770"),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    public interface IOleCommandTarget
    {
        //IMPORTANT: The order of the methods is critical here. You
        //perform early binding in most cases, so the order of the methods
        //here MUST match the order of their vtable layout (which is determined
        //by their layout in IDL). The interop calls key off the vtable ordering,
        //not the symbolic names. Therefore, if you
        //switched these method declarations
        //and tried to call the Exec method
        //on an IOleCommandTarget interface from your
        //application, it would translate
        //into a call to the QueryStatus method instead.
        void QueryStatus(ref Guid pguidCmdGroup, UInt32 cCmds,
        [MarshalAs(UnmanagedType.LPArray, SizeParamIndex=1)]
        OLECMD[] prgCmds, ref OLECMDTEXT CmdText);
        void Exec(ref Guid pguidCmdGroup, uint nCmdId, uint nCmdExecOpt,
        ref object pvaIn, ref object pvaOut);
     }
  }
}