title: Creating a "swing-o-meter" rotating an image that is inside a pictureBox
body: <p>so I decided to just jump in with learning to code some more and have managed to get rather stuck since I don't know enough basics <em>I think</em>. I have done some work in C and a little in C++ before if that makes any difference.</p>
  
  <p>I decided I wanted to make pointer that is oriented at some angle based on the input. I have everything working bar getting the arrow to rotate. So far I have an arrow bmp image within a pictureBox and the following code which doesn't show up any errors until I build. I'm not entirely sure what else anyone may need to know in order to help so for now I'll just post my code.</p>
  
  <pre><code>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;
  
  namespace WindowsFormsApplication1
  {
  public partial class Form1 : Form
  {
      public Form1()
      {
          InitializeComponent();
      }
  
      private void label1_Click(object sender, EventArgs e)
      {
  
      }
      private Bitmap MoveImageByDesiredAngle(int original_width, int original_height, float desiredAngle)
      {
          Bitmap resultPicture = new Bitmap(original_width, original_height);
          Graphics g = Graphics.FromImage(resultPicture);
          g.TranslateTransform((float)original_width / 2, (float)original_height / 2);
          g.RotateTransform(desiredAngle);
          g.TranslateTransform(-(float)original_width / 2, -(float)original_height / 2);
          g.DrawImage(pictureBox1.Image, new Point(0, 0));
          return resultPicture;
      }
      private void button1_Click(object sender, EventArgs e)
      {
          float o;
          float r;
  
          o = float.Parse(textBox1.Text);
          r = float.Parse(textBox2.Text);
  
  
          float ratio;
          float angle;
          ratio = o / (o + r);
          angle = ratio * 180;
  
          Bitmap resultPicture = MoveImageByDesiredAngle(pictureBox3.Image.Width, pictureBox3.Image.Height, angle);
          pictureBox3.Image = resultPicture;
      }
  
  }
  }
  </code></pre>