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using System;

using System.Collections.Generic;

using System.Linq;

using System.Runtime.InteropServices;

using System.Text;

using System.Threading.Tasks;

namespace CrypterExample

{

class Writer

{

[DllImport("kernel32.dll", SetLastError = true)]

public static extern IntPtr BeginUpdateResource(string pFileName,

[MarshalAs(UnmanagedType.Bool)]bool bDeleteExistingResources);

[DllImport("kernel32.dll", SetLastError = true)]

static extern bool UpdateResource(IntPtr hUpdate, string lpType, string lpName, ushort wLanguage, IntPtr lpData, uint cbData);

[DllImport("kernel32.dll", SetLastError = true)]

public static extern bool EndUpdateResource(IntPtr hUpdate, bool fDiscard);

public enum ICResult

{

Success,

FailBegin,

FailUpdate,

FailEnd

}

public static ICResult WriteResource(string FileName, byte[] FileBytes)

{

IntPtr hUpdate = BeginUpdateResource(FileName, false);

GCHandle Handle = GCHandle.Alloc(FileBytes, GCHandleType.Pinned);

if (!UpdateResource(hUpdate, "RT_RCDATA", "Encrypted", 1066, Handle.AddrOfPinnedObject(), Convert.ToUInt32(FileBytes.Length)))

return ICResult.FailUpdate;

if (!EndUpdateResource(hUpdate, false))

return ICResult.FailEnd;

return ICResult.Success;

}

}

}