C#

/*
   Game Rise of The Synaptic 1/3
   Copyright (C) 2016 Jozef Bakoš
   Tento program je slobodný softvér: môžete ho šíriť a upravovať podľa ustanovení Všeobecnej verejnej licencie GNU 
   (GNU General Public Licence), vydávanej nadáciou Free Software Foundation a to buď podľa 3. verzie tejto Licencie, 
   alebo (podľa vášho uváženia) ktorejkoľvek neskoršej verzie. Tento program je rozširovaný v nádeji, že bude užitočný,
   avšak BEZ AKEJKOĽVEK ZÁRUKY. Neposkytujú sa ani odvodené záruky PREDAJNOSTI alebo VHODNOSTI PRE URČITÝ ÚČEL. 
   Ďalšie podrobnosti hľadajte vo Všeobecnej verejne licencii GNU.

   Kópiu Všeobecnej verejnej licencie GNU ste mali dostať spolu s týmto programom. 
   Ak sa tak nestalo, nájdete ju tu: <http://www.gnu.org/licenses/>. .
 */
 
using System;
using System.Drawing;
using System.Windows.Forms;
using PlaySound;
using System.Drawing.Drawing2D;

namespace sls
{

	/// <summary>
	/// Description of go.
	/// </summary>
	public partial class go : Form
	{
		public go()
		{
			//
			// The InitializeComponent() call is required for Windows Forms designer support.
			//
			InitializeComponent();
			
			//
			// TODO: Add constructor code after the InitializeComponent() call.
			//
		}
		int RotatePlayerinfo = 0;
		int TempMatrixX = 0;
		int TempMatrixY = 0;
		bool left;
		bool right;
		bool up;
		bool down;
		
		
		void GoLoad(object sender, EventArgs e)
		{
			// Default setings
			this.Cursor = Cursors.Cross;
     		this.ControlBox = false;
			//this.FormBorderStyle = FormBorderStyle.None;
            this.WindowState = FormWindowState.Maximized;
            this.DoubleBuffered = true;
			
            // Timer setings
            Refresh.Interval = 50;
			Refresh.Enabled = true;
			PlayerInfo.Interval = 500;
            PlayerInfo.Enabled = true;
            PlayerMoving.Interval = 50;
            PlayerMoving.Enabled = true;
            
           
            
			// Picturebox setings
			//playerBox.BackColor = Color.Transparent;
			
			// Event setings
			this.Paint += new PaintEventHandler(GoPaint);
			
 		}
		
		void GoKeyDown(object sender, KeyEventArgs e)
		{
			if ( e.KeyCode == Keys.Left ) { left = true; }
			if ( e.KeyCode == Keys.Right) { right = true; }
			if ( e.KeyCode == Keys.Up ) { up = true; }
			if ( e.KeyCode == Keys.Down ) { down = true; }
		}
		
		void GoKeyUp(object sender, KeyEventArgs e)
		{
			if ( e.KeyCode == Keys.Left ) { left = false; }
			if ( e.KeyCode == Keys.Right) { right = false; }
			if ( e.KeyCode == Keys.Up ) { up = false; }
			if ( e.KeyCode == Keys.Down ) { down = false; }
		}
		
		void GoPaint(object sender, PaintEventArgs e)
		{
			 Image terrain = Image.FromFile(@"object\terrain.bmp");
			 e.Graphics.DrawImage(terrain, TempMatrixX, TempMatrixY);
			 
			 Image player = Image.FromFile(@"object\player1.png");
			 e.Graphics.DrawImage(player , 0, this.Height - 130, 100 , 100);
    	}
		
		void RefreshTick(object sender, EventArgs e)
		{
			this.Refresh();
		}
		
		void PlayerInfoTick(object sender, EventArgs e)
		{
			// Rotate player
			RotatePlayerinfo++;
		}
		
		void PlayerMovingTick(object sender, EventArgs e)
		{
	     	// Debug information
			this.Text="Terrain X:"+TempMatrixX+" Terrain Y:"+TempMatrixY;
			
			if ( TempMatrixX > -1 ) { TempMatrixX = -1; }
			if ( TempMatrixY > -1 ) { TempMatrixY = -1; }
			
			// Move verticaly terrainBox
			if ( up == true ) { TempMatrixY++;  }
			if ( down == true ) { TempMatrixY--; }
				
			// Move horizontaly terrainBox
			if ( left == true ) { TempMatrixX--; } 
		if ( right == true ) { TempMatrixX++;}
			
		
		}
		
	}
}

Is it possible to detect the encoding of each txt file what you import into textBox1.
For example:
If you import a txt file in textBox1 ... 
label1.Text = "Windows 1250 - ANSI"; or label1.Text = "Windows 1251 - ANSI" or label1.Text = "UTF-8" ...
If it is possible how to do it, and if it is not possible I apologize. Thank you.

[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
        static extern IntPtr FindWindowByCaption(IntPtr ZeroOnly, string lpWindowName);

        //include FindWindowEx
        [DllImport("user32.dll")]
        public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

        //include SendMessage
        [DllImport("user32.dll")]
        public static extern int SendMessage(IntPtr hWnd, uint uMsg, IntPtr wParam, string lParam);

        //this is a constant indicating the window that we want to send a text message
        const int WM_SETTEXT = 0X000C;

  private void button1_Click(object sender, EventArgs e)
        {
           
            Process p = Process.Start("SomeApp.exe");
            IntPtr AppTextBox = IntPtr.Zero;
            int i = 0;

            do
            {
                AppTextBox = FindWindowByCaption(IntPtr.Zero, "SomeApp");
                i++;
            } while (AppTextBox.ToInt32() == 0);

          
            // I DONT WANT TO USE SLEEP METHOD HERE
            Thread.Sleep(4000);
        
            AppTextBox = FindWindowEx(p.MainWindowHandle, IntPtr.Zero, "Edit", null);

          
            SendMessage(AppTextBox, WM_SETTEXT, IntPtr.Zero , "Success!");
            
        }