c# write text in another application

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C#

application

text

c# Visual studio windows form:

How do I write some text in another application without first forcing the application in the foreground ?

This code forces notebook in the forground and writes Hello World!

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Diagnostics;


namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        //Søg efter aktive vinduer
        [DllImport("user32.dll")]
        public static extern IntPtr FindWindow(String sClassName, String sAppName);


        [DllImport("user32.dll")]
        private static extern bool RegisterHotkey(IntPtr hWnd, int id, uint fsModifiers, uint vk);

        [DllImport("user32.dll")]
        static extern bool SetForegroundWindow(IntPtr hWnd);



        public Form1()
        {
            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // Gem vindue som thisWindow
            IntPtr thisWindow = FindWindow(null, "Unavngivet - Notesblok");

            // Sæt thisWindow i forgrunden
            SetForegroundWindow(thisWindow);
            SendKeys.Send("Hello World!");


        }

    }
}