c#实现IOleCommandTarget接口（原闯）

using System;
using System.Runtime.InteropServices;
namespace d4htmlinterface
{
    /**//// <summary>
    /// Class1 的摘要说明。
    /// </summary>
    public class htmlinterface
    {
        public htmlinterface()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
        [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);
        }
    }
}