Söker ett program

private Keys mLastKey;
  private int mRepeatCount = 1;

  protected override void OnKeyDown(KeyEventArgs e) {
    if (e.KeyCode == mLastKey) 
      ++mRepeatCount;
    else {
      mRepeatCount = 1;
      mLastKey = e.KeyCode;
    }
    base.OnKeyDown(e);
  }