.NET Shell Extensions - Shell Drop Handlers

using System;
using System.Runtime.InteropServices;
using System.Text;

namespace SharpShell.Interop
{
    [ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("000214e4-0000-0000-c000-000000000046")]
    public interface IContextMenu
    {
        [PreserveSig]
        int QueryContextMenu(
            IntPtr hMenu,
            uint indexMenu,
            int idCmdFirst,
            int idCmdLast,
            uint uFlags);

        [PreserveSig]
        void InvokeCommand(IntPtr pici);

        [PreserveSig]
        void GetCommandString(
            int idcmd,
            uint uflags,
            int reserved,
            StringBuilder commandstring,
            int cch);
    }
}