title: Executing KeyDown method after pressing button
body: <p>Okay my last question wasn't really clear on things, so I deleted it and made this one.
  I'm making the game 'snake'.
  What I want is that AFTER I select a difficulty, the keydown on the form needs to work 
  (you select a difficulty, the snake gets drawn and starts moving, in order for it to move to your preferred direction, you press the arrow keys)
  Before I added the difficulties it worked perfectly.
  Right now after I select the difficulty and want to play the game, the snake doesn't move, my keys don't react in the program.</p>
  
  <p>So my problem = keyDown not working after selecting difficulty.</p>
  
  <pre><code>private void btnNormal_Click(object sender, EventArgs e)
  {
    timer1.Interval = 250;
    btnNormal.Visible = false;
    btnEasy.Visible = false;
    btnHard.Visible = false;
    diffLabel.Visible = false;
    timer1.Enabled = true;
    down = false;
    up = false;
    right = true;
    left = false;
  
  }
  
  private void btnHard_Click(object sender, EventArgs e)
  {
    timer1.Interval = 10;
    btnNormal.Visible = false;
    btnEasy.Visible = false;
    btnHard.Visible = false;
    diffLabel.Visible = false;
    timer1.Enabled = true;
    down = false;
    up = false;
    right = true;
    left = false;
  }
  
  private void btnEasy_Click(object sender, EventArgs e)
  {
    timer1.Interval = 500;
    btnNormal.Visible = false;
    btnEasy.Visible = false;
    btnHard.Visible = false;
    diffLabel.Visible = false;
    timer1.Enabled = true;
    down = false;
    up = false;
    right = true;
    left = false;
  }
  
  private void Form1_KeyDown(object sender, KeyEventArgs e)
  {
  
    if (e.KeyData == Keys.Down &amp;&amp; up == false)
    {
      down = true;
      right = false;
      up = false;
      left = false;
    }
  
    if (e.KeyData == Keys.Up &amp;&amp; down == false)
    {
      down = false;
      right = false;
      up = true;
      left = false;
    }
  
    if (e.KeyData == Keys.Right &amp;&amp; left == false)
    {
      down = false;
      right = true;
      up = false;
      left = false;
    }
  
    if (e.KeyData == Keys.Left &amp;&amp; right == false)
    {
      down = false;
      right = false;
      up = false;
      left = true;
    }
  }
  </code></pre>