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 protected override void OnPaint(System.Windows.Forms.PaintEventArgs pe)
            {
                base.OnPaint(pe);
             
                System.Drawing.Graphics g = pe.Graphics;
               
                System.Drawing.Pen p1 = new System.Drawing.Pen(System.Drawing.Color.Red);

                System.Drawing.Point point1 = new System.Drawing.Point();
                point1.X = 120;
                point1.Y = 100;
                System.Drawing.Point point2 = new System.Drawing.Point();
                point2.X = 100;
                point2.Y = 100;
                System.Drawing.Point point3 = new System.Drawing.Point();
                point3.X = 120;
                point3.Y = 120;
                System.Drawing.Point point4 = new System.Drawing.Point();
                point4.X = 140;
                point4.Y = 120;

                g.DrawLine(p1, point1, point2);
                g.DrawLine(p1, point1, point3);
                g.DrawLine(p1, point3, point4);
            }

            private void buttonStation1Station2_Click(object sender, EventArgs e)
            {
                this.pictureBox1.Left = 140;
                this.pictureBox1.Top = 120;
            }

            private void buttonStation2Station1_Click(object sender, EventArgs e)
            {
                this.pictureBox1.Left = 100;
                this.pictureBox1.Top = 100;
            }
        }
    }                    

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private void Form1_Load(object sender, EventArgs e)
        {
            System.Windows.Forms.Timer formsTimer = new System.Windows.Forms.Timer();
            formsTimer.Interval = 1000; // Intervall in Millisekunden
            formsTimer.Enabled = true;
            formsTimer.Tick += new EventHandler(TimerEvent);
        }

private void TimerEvent(Object myObject, EventArgs myEventArgs)
            {
                this.Text = DateTime.Now.ToString();
            }                    

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if (formsTimer.Interval.Equals(3000))
            {
                formsTimer.Tick += new EventHandler(TimerEvent);
            }                    

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 private void TimerEvent(Object myObject, EventArgs myEventArgs)
        {
            this.pictureBox1.Location = new System.Drawing.Point(300, 100);
        }                    

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private void timer1_Tick(Object myObject, EventArgs myEventArgs)
        {
            if (pictureBox1.Location == new System.Drawing.Point(100, 81))
            { pictureBox1.Hide(); }
            else
            {pictureBox1.Left = pictureBox1.Left + 1;}
        }                    

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private void timer1_Tick(Object myObject, EventArgs myEventArgs)
        {
            if (pictureBox1.Location == new System.Drawing.Point(100, 81))
             { pictureBox1.Left = pictureBox1.Left + 0;} 
            else
            {pictureBox1.Left = pictureBox1.Left + 1;}
        }                    

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p(t) = a + vt/|b-a|*(b-a)                    

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private void timer1_Tick(Object myObject, EventArgs myEventArgs)
        {
            if (pictureBox1.Location == new System.Drawing.Point(185, 100))
            {
                Thread.Sleep(1000);
                pictureBox1.Left = pictureBox1.Left + 1;
            }

            else if(pictureBox1.Location == new System.Drawing.Point(335, 100))
            {
                Thread.Sleep(1000);
                pictureBox1.Left = pictureBox1.Left + 1;
            }

            else if (pictureBox1.Location == new System.Drawing.Point(400, 100))
            {
                for (int i = 1; i <= 36; i++)
                {
                    pictureBox1.Top = pictureBox1.Top - 1;
                    pictureBox1.Left = pictureBox1.Left + 1;
                }
            }

            else if (pictureBox1.Location == new System.Drawing.Point(550, 80))
            {
                Thread.Sleep(1000);
                timer1.Enabled = false;
            }

           else
            { pictureBox1.Left = pictureBox1.Left + 1; }
        }
        }
    }                    

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FileStream imageStream = new FileStream("C:\\Users\\vista\\xxx.gif", FileMode.Open, FileAccess.Read);
pictureBox1.Image = System.Drawing.Image.FromStream(imageStream);                    

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        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) // Startorteingabe
            {     
            if (comboBox1.SelectedItem.ToString() == "Haltepunkt1")
            {
                ...?
            }
            else if (comboBox1.SelectedItem.ToString() == "Haltepunkt2")
            {
                ...?
            }
            else if (comboBox1.SelectedItem.ToString() == "Haltepunkt3")
            {
                ...?
            }
            
            private void comboBox2_SelectedIndexChanged(object sender, EventArgs e) // Zielorteingabe
            {
            if (comboBox2.SelectedItem.ToString() == "Haltepunkt1")
            {
                ...?
            }
            else if (comboBox2.SelectedItem.ToString() == "Haltepunkt2")
            {
                ...?
            }
            else if (comboBox2.SelectedItem.ToString() == "Haltepunkt3")
            {
                ...?
            }                    

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 private void timer1_Tick(object sender, EventArgs e)
        {
            for (int j = 0; j < 1441; j++)
            {
                for (int i = 0; i < j; i++)
                {

                    int value1 = 1 + i;
                    double value2 = 1 + i;
                    int time = value1 / 60;
                    double time2 = (value2 / 60);
                    double time3 = ((time2 - time) * 100);
                    double time4 = (time3 * 0.6);
                    string time5 = String.Format("{0:F0}", time4);

                    textBox1.Text = time.ToString();
                    textBox2.Text = time5.ToString();
                }
                textBox1.Update();
                textBox2.Update();
            }
        }                    

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        int time = 0;
        int erg = 0;

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (textBox1.Text == "23:59")
            {
                timer1.Enabled = true;
            }

            else
            {
                int time2 = 1;

                erg = time + time2;
                time = erg; 

                int basiswert = erg / 60;
                double basiswert2 = erg % 60;

                string basiswert3 = String.Format("{00:F0}:", basiswert);
                string basiswert4 = String.Format("{00:F0}", basiswert2);

                textBox1.Text = basiswert3.ToString() + basiswert4.ToString();
                textBox1.Update();
            }
            
        }                    

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                string basiswert3 = String.Format("{0:00}:", basiswert);
                string basiswert4 = String.Format("{0:00}", basiswert2);                    

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private void timer01_Tick(object sender, EventArgs e)
        {
            if (textBox1.Text == "00:10")
            {
                pictureBox01.Visible = true;
                pictureBox01.Location = new System.Drawing.Point(775, 527);
            }

            else if (pictureBox01.Location == new System.Drawing.Point(xxx, 527))
            {
                time01.Interval = 100;
                pictureBox01.Left = pictureBox01.Left - 1;
            }
            else
            {
                timer01.Interval = 100;
                pictureBox01.Top = pictureBox01.Top - 1;
            }                    

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else if ((pictureBox01.Location.X >= 622) && (pictureBox01.Location.Y == 527))
            {
                timer01.Interval = 100;
                pictureBox01.Left = pictureBox01.Left - 1;
            }                    

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void timer1_Tick(...)
{
  CodeUmDieErstePictureBoxZuBewegen();
  CodeUmDieZweitePictureBoxZuBewegen();
}                    

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 private void button1_Click(object sender, EventArgs e)
        {
                       textBox2.Text = ("Die Zahl ist {0}", textBox1.Text);
        }                    

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textBox2.Text = string.Format("Die Zahl ist {0}", textBox1.Text);