C# Helper file for using WM_DATACOPY in Win32 API

MessageHelper

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.InteropServices;
using System.Diagnostics;

public class MessageHelper
{
    [DllImport("User32.dll")]
    private static extern int RegisterWindowMessage(string lpString);
    
    [DllImport("User32.dll", EntryPoint = "FindWindow")]
    public static extern Int32 FindWindow(String lpClassName, String lpWindowName);
    
    //For use with WM_COPYDATA and COPYDATASTRUCT
    [DllImport("User32.dll", EntryPoint = "SendMessage")]
    public static extern int SendMessage(int hWnd, int Msg, int wParam, ref COPYDATASTRUCT lParam);
    
    //For use with WM_COPYDATA and COPYDATASTRUCT
    [DllImport("User32.dll", EntryPoint = "PostMessage")]
    public static extern int PostMessage(int hWnd, int Msg, int wParam, ref COPYDATASTRUCT lParam);
    
    [DllImport("User32.dll", EntryPoint = "SendMessage")]
    public static extern int SendMessage(int hWnd, int Msg, int wParam, int lParam);
    
    [DllImport("User32.dll", EntryPoint = "PostMessage")]
    public static extern int PostMessage(int hWnd, int Msg, int wParam, int lParam);
    
    [DllImport("User32.dll", EntryPoint = "SetForegroundWindow")]
    public static extern bool SetForegroundWindow(int hWnd);
    
    public const int WM_USER = 0x400;
    public const int WM_COPYDATA = 0x4A;
    
    //Used for WM_COPYDATA for string messages
    public struct COPYDATASTRUCT
    {
        public IntPtr dwData;
        public int cbData;
        [MarshalAs(UnmanagedType.LPStr)]
        public string lpData;
    }
    
    public bool bringAppToFront(int hWnd)
    {
        return SetForegroundWindow(hWnd);
    }
    
    public int sendWindowsStringMessage(int hWnd, int wParam, string msg)
    {
        int result = 0;
        
        if (hWnd > 0)
        {
            byte[] sarr = System.Text.Encoding.Default.GetBytes(msg);
            int len = sarr.Length;
            COPYDATASTRUCT cds;
            cds.dwData = (IntPtr)100;
            cds.lpData = msg;
            cds.cbData = len + 1;
            result = SendMessage(hWnd, WM_COPYDATA, wParam, ref cds);
        }
        
        return result;
    }
    
    public int sendWindowsMessage(int hWnd, int Msg, int wParam, int lParam)
    {
        int result = 0;
        
        if (hWnd > 0)
        {
            result = SendMessage(hWnd, Msg, wParam, lParam);
        }
        
        return result;
    }
    
    public int getWindowId(string className, string windowName)
    {
        return FindWindow(className, windowName);
    }
}