Develop Reference

A Green Border Around My C# WinForm Application

I created a minimal WinForm Application in C#.
Everything Works Fine but for some reason a "Green border" Surrounds My Application.
I Pasted the code down below.
[program.cs]
namespace WinFormsApp1
{
internal static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
// To customize application configuration such as set high DPI settings or default font,
// see https://aka.ms/applicationconfiguration.
ApplicationConfiguration.Initialize();
Application.Run(new Form1());
}
}
}
[Form1.cs]
namespace WinFormsApp1
{
public partial class Form1 : Form
{
int counter = 0;
public Form1()
{
InitializeComponent();
}
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.progressBar1 = new System.Windows.Forms.ProgressBar();
this.backgroundWorker1 = new System.ComponentModel.BackgroundWorker();
this.textanimationWorker = new System.ComponentModel.BackgroundWorker();
this.label2 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// label1
//
this.label1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.label1.AutoSize = true;
this.label1.BackColor = System.Drawing.Color.Transparent;
this.label1.Font = new System.Drawing.Font("Segoe UI", 40F, System.Drawing.FontStyle.Italic, System.Drawing.GraphicsUnit.Point);
this.label1.ForeColor = System.Drawing.SystemColors.ButtonHighlight;
this.label1.Location = new System.Drawing.Point(543, 209);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(466, 72);
this.label1.TabIndex = 0;
this.label1.Text = "Uploading RootKit.";
this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label1.Click += new System.EventHandler(this.label1_Click);
//
// button1
//
this.button1.Font = new System.Drawing.Font("Segoe UI", 25F, System.Drawing.FontStyle.Italic, System.Drawing.GraphicsUnit.Point);
this.button1.Location = new System.Drawing.Point(43, 508);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(222, 70);
this.button1.TabIndex = 1;
this.button1.Text = "Upload RootKit";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// progressBar1
//
this.progressBar1.Location = new System.Drawing.Point(43, 284);
this.progressBar1.MarqueeAnimationSpeed = 1;
this.progressBar1.Maximum = 10;
this.progressBar1.Name = "progressBar1";
this.progressBar1.Size = new System.Drawing.Size(1037, 23);
this.progressBar1.Step = 1;
this.progressBar1.TabIndex = 2;
this.progressBar1.Click += new System.EventHandler(this.progressBar1_Click);
//
// backgroundWorker1
//
this.backgroundWorker1.WorkerReportsProgress = true;
this.backgroundWorker1.DoWork += new System.ComponentModel.DoWorkEventHandler(this.backgroundWorker1_DoWork);
this.backgroundWorker1.ProgressChanged += new System.ComponentModel.ProgressChangedEventHandler(this.backgroundWorker1_ProgressChanged);
this.backgroundWorker1.RunWorkerCompleted += new System.ComponentModel.RunWorkerCompletedEventHandler(this.backgroundWorker1_RunWorkerCompleted);
//
// textanimationWorker
//
this.textanimationWorker.WorkerReportsProgress = true;
this.textanimationWorker.DoWork += new System.ComponentModel.DoWorkEventHandler(this.textanimationWorker_DoWork);
this.textanimationWorker.ProgressChanged += new System.ComponentModel.ProgressChangedEventHandler(this.textanimationWorker_ProgressChanged);
this.textanimationWorker.RunWorkerCompleted += new System.ComponentModel.RunWorkerCompletedEventHandler(this.textanimationWorker_RunWorkerCompleted);
//
// label2
//
this.label2.AutoSize = true;
this.label2.ForeColor = System.Drawing.SystemColors.ButtonHighlight;
this.label2.Location = new System.Drawing.Point(1036, 594);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(86, 15);
this.label2.TabIndex = 3;
this.label2.Text = "DECRAT V1.0.0";
this.label2.Click += new System.EventHandler(this.label2_Click);
//
// Form1
//
this.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
this.ClientSize = new System.Drawing.Size(1134, 618);
this.Controls.Add(this.label2);
this.Controls.Add(this.progressBar1);
this.Controls.Add(this.button1);
this.Controls.Add(this.label1);
this.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Italic, System.Drawing.GraphicsUnit.Point);
this.Name = "Form1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
this.PerformLayout();
}
private void Form1_Load(object sender, EventArgs e)
{
Console.WriteLine("Loading Form1.. Please wait..");
}
private void label1_Click(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
progressBar1.Value = 0;
progressBar1.Maximum = 10;
backgroundWorker1.RunWorkerAsync();
textanimationWorker.RunWorkerAsync();
}
private void progressBar1_Click(object sender, EventArgs e)
{
}
private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
{
for (int i = 0; i < 10; i++) {
backgroundWorker1.ReportProgress(0);
Thread.Sleep(1000);
}
}
private void backgroundWorker1_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e)
{
counter = 50;
MessageBox.Show("Uploaded RootKit Successfully!");
counter = 0;
}
private void backgroundWorker1_ProgressChanged(object sender, System.ComponentModel.ProgressChangedEventArgs e)
{
progressBar1.Value += 1;
}
private void textanimationWorker_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
{
while (counter <= 10)
{
if (counter <= 3)
{
counter++;
textanimationWorker.ReportProgress(0);
Thread.Sleep(500);
}
else if(counter == 50){
break;
}
else {
counter = 0;
textanimationWorker.ReportProgress(0);
}
}
}
private void textanimationWorker_ProgressChanged(object sender, System.ComponentModel.ProgressChangedEventArgs e)
{
if (counter == 1)
{
label1.Text = "Uploading RootKit";
}
else {
label1.Text += ".";
}
}
private void textanimationWorker_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e)
{
}
private void label2_Click(object sender, EventArgs e)
{
}
}
}
FYI: I also published it to an exe file but still the green border does not disappear!
I Thought the green border appears just when I code so that I know where the border is but the issue seems with C# ? or probably with something else ?
EDIT [Adding More information]: I want the green border to disappear.
Here is a photo of the Application..

Green box Indicates The Executable or the program is sandboxed.
I am using COMODO Antivirus and it sandboxed it.
By Turning the antivirus off for a min and running the program the green box disappeared indicating that the executable is not sandboxed.

How can I find if a selection is inside the rubberband selection in a ListView?

I am using the events ItemSelectionChanged and SelectedIndexChanged of the ListView class to answer this question.
The code is below, and the only bug that seems to remain is that I use the 250ms timer also when the user uses rubberband selection, not only for single or double click selection.
internal Form1()
{
InitializeComponent();
t.Tick += T_Tick;
}
internal bool santinela = false;
internal void T_Tick(object sender, EventArgs e)
{
t.Stop();
if (!santinela)
{
bool newVal = selectionChangedItem.Selected;
selectionChangedItem.Checked =
selectionChangedItem.Selected = newVal;
santinela = true;
}
}
internal Timer t = new Timer()
{
Interval = 250
};
internal bool santinela3 = true;
internal void listView1_ItemCheck(object sender, ItemCheckEventArgs e)
{
if (santinela3)
{
if (e.CurrentValue == CheckState.Checked)
{
listView1.SelectedIndices.Remove(e.Index);
}
else if (e.CurrentValue == CheckState.Unchecked)
{
listView1.SelectedIndices.Add(e.Index);
}
}
}
internal void listView1_ItemActivate(object sender, EventArgs e)
{
if (listView1.SelectedItems.Count > 0)
{
MessageBox.Show(listView1.SelectedItems[0].Text);
}
}
internal ListViewItem selectionChangedItem = null;
internal bool santinela2 = true;
internal void listView1_ItemSelectionChanged(object sender, ListViewItemSelectionChangedEventArgs e)
{
if (!santinela2)
{
return;
}
if (t.Enabled)
{
santinela = true;
t.Stop();
// double click: both clicks must be done in the same place
if (e.Item == selectionChangedItem)
{
if (!e.IsSelected)
{
santinela2 = true;
e.Item.Selected = true;
santinela2 = false;
}
listView1_ItemActivate(sender, EventArgs.Empty);
}
selectionChangedItem = null;
}
else
{
santinela = false;
t.Stop();
selectionChangedItem = e.Item;
t.Start();
}
}
internal void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
if (listView1.SelectedIndices.Count == 0)
{
santinela = true;
t.Stop();
selectionChangedItem = null;
santinela3 = false;
for (int i = 0; i < listView1.CheckedItems.Count; ++i)
{
listView1.CheckedItems[i].Checked = false;
}
santinela3 = true;
}
}
The relevant designer code is below:
System.Windows.Forms.ListViewItem listViewItem1 = new System.Windows.Forms.ListViewItem("item1");
System.Windows.Forms.ListViewItem listViewItem2 = new System.Windows.Forms.ListViewItem("item2");
this.listView1 = new System.Windows.Forms.ListView();
this.SuspendLayout();
//
// listView1
//
this.listView1.CheckBoxes = true;
listViewItem1.StateImageIndex = 0;
listViewItem2.StateImageIndex = 0;
this.listView1.Items.AddRange(new System.Windows.Forms.ListViewItem[] {
listViewItem1,
listViewItem2});
this.listView1.Location = new System.Drawing.Point(12, 12);
this.listView1.Name = "listView1";
this.listView1.Size = new System.Drawing.Size(401, 327);
this.listView1.TabIndex = 0;
this.listView1.UseCompatibleStateImageBehavior = false;
this.listView1.ItemActivate += new System.EventHandler(this.listView1_ItemActivate);
this.listView1.ItemCheck += new System.Windows.Forms.ItemCheckEventHandler(this.listView1_ItemCheck);
this.listView1.ItemSelectionChanged += new System.Windows.Forms.ListViewItemSelectionChangedEventHandler(this.listView1_ItemSelectionChanged);
this.listView1.SelectedIndexChanged += new System.EventHandler(this.listView1_SelectedIndexChanged);
Update: The issue I am facing because of the timer is that after hovering with the rubberband a ListViewItem, there is the useless delay of the timer before the item gets checked. When the user resizes/moves the rubberband so that the ListViewItem is no longer checked, there is the same delay. If the user does not know of that non-standard delay, the selection can be wrong.

How to make Form Visible in C#

I am trying to design a piano for an assignment in C#. I have created a MusicKey class which stores music keys (as well as a BlackMusicKey class). I am populating the panel, 'panel1' with music keys like this:
this.panel1.Controls.Add(bmk);
In the music key constructor, I am setting a location and size for each music key, as well as ensuring that Visibility is set to true. However, when I run the form, it is completely blank.
Is there something that I am missing? I am quite sure that there is nothing wrong with the visibility of the music keys, so surely there is something that I am missing with regards to making the panel visible.
Any help will be appreciated, thanks!
Note: I have also tried using panel1.Show() which still did not work.
All relevant code can be found down below:
MusicKeyClass:
class MusKey : System.Windows.Forms.Button
{
private int musicNote; //determines the pitch mapped to number
public MusKey(int iNote, int x, int y) : base()
{
musicNote = iNote;
this.Location = new System.Drawing.Point(x, y);
this.Size = new System.Drawing.Size(20, 80);
this.Visible = true;
}
public int getMusicNote()
{
return musicNote;
}
}
Form1 Class:
public partial class Form1 : Form
{
int count = 0;
int xLoc = 50;
int yLoc = 30;
int[] whitePitch = { 1, 3, 5, 6, 8, 10, 12, 13, 15, 17, 18, 20, 22, 24 };
Panel panel1 = new Panel();
System.Windows.Forms.Timer timer1 = new System.Windows.Forms.Timer();
Button button1 = new Button();
private void Form1_Load(object sender, EventArgs e)
{
this.Paint += new PaintEventHandler(function);
MusKey mk;
BlackMusKey bmk;
for (int k = 0; k < 14; k++)
{
int pitch = whitePitch[k];
int ixPos = k * 20;
mk = new MusKey(pitch, ixPos, yLoc);
mk.MouseDown += new MouseEventHandler(this.button1_MouseDown);
mk.MouseUp += new MouseEventHandler(this.button1_MouseUp);
this.panel1.Controls.Add(mk);
}
int xOffs = 20;
int[] blackPitch = { 2, 4, 7, 9, 11, 14, 16, 19, 21, 23 };
int[] xPos = { 10, 30, 70, 110, 150, 170, 210, 230, 250 };
const int yPosBlack = 50;
for (int k = 0; k < 10; k++)
{
int pitch = blackPitch[k];
int ixPos = xPos[k];
bmk = new BlackMusKey(pitch, ixPos, yPosBlack);
bmk.MouseDown += new System.Windows.Forms.MouseEventHandler(this.button1_MouseDown); //create event MouseDown
bmk.MouseUp += new System.Windows.Forms.MouseEventHandler(this.button1_MouseUp); //create event MouseUp
this.panel1.Controls.Add(bmk);
this.panel1.Controls[this.panel1.Controls.Count - 1].BringToFront();
}
}
SoundPlayer sp = new SoundPlayer();
int count1;
private void button1_MouseDown(object sender, MouseEventArgs e)
{
foreach (MusKey mk in this.panel1.Controls)
{
if (sender == mk)
{ //true for the specific key pressed on the Music Keyboard
if (e.Button == MouseButtons.Left)
{
timer1.Enabled = true; //variable of the Timer component
count = 0; //incremented by the timer1_Tick event handler
timer1.Start();
sp.SoundLocation = (mk.getMusicNote() + ".wav"); //might need to convert ToString() ??
sp.Play();
}
}
}
}
private void timer1_Tick(object sender, EventArgs e)
{
count = count++;
}
private void button1_MouseUp(object sender, MouseEventArgs e)
{
foreach (MusKey mk in this.panel1.Controls)
{
if (sender == mk) //true for the specific key pressed on the Music Keyboard
{
if (e.Button == MouseButtons.Left)
{
timer1.Enabled = false;
sp.Stop();
string bNoteShape = null;
int duration = 0;
if (count >= 16)
{
bNoteShape = "SemiBreve";
duration = 16;
}
if (count >= 8 && count <= 15)
{
bNoteShape = "DotMinim";
duration = (8 + 15) / 2;
}
if (count >= 4 && count <= 7)
{
bNoteShape = "Crotchet";
duration = (4 + 7) / 2;
}
if (count >= 2 && count <= 3)
{
bNoteShape = "Quaver";
duration = (2 + 3) / 2;
}
if (count >= 1)
{
bNoteShape = "Semi-Quaver";
duration = 1;
}
MusicNote mn = new MusicNote(mk.getMusicNote(), duration, bNoteShape); //music note construction
// mn.Location = new Point(xLoc, yLoc);
//this.panel2.Controls.Add(this.mn); //adding MusicNote component to MusicStaff (panel2) collection
xLoc = xLoc + 15;
}
}
}
}
private void function(object sender, PaintEventArgs e)
{
panel1.Show();
panel1.Visible = true;
panel1.BackColor = Color.Blue;
panel1.Size = new Size(5, 5);
panel1.Location = new Point(3, 3);
this.Controls.Add(panel1);
this.Controls.Add(button1);
}
private void Form1_Load_1(object sender, EventArgs e)
{
}
}
Form 1 [designer] Class:
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.SuspendLayout();
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 20F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(800, 450);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load_1);
this.ResumeLayout(false);
}
#endregion
}
Music Note Class
class MusicNote
{
public int notepitch;
public String noteshape;
public int noteduration;
enum accid { sharp, flat, sole };
bool dragging = false;
System.Timers.Timer timer1 = new System.Timers.Timer();
public MusicNote(int iNotepitch, int iDuration, String iBnoteShape)
{
notepitch = iNotepitch;
noteduration = iDuration;
noteshape = iBnoteShape;
}
bool timeron = false;
bool changenote = false;
public static int start = 0;
//public void click(object sender, MouseEventArgs e) { }
//public void RightPress(object sender, MouseEventArgs e) { }
}
}
Black Music Key Class
class BlackMusKey : MusKey
{
public BlackMusKey(int iNote, int x, int y) : base(iNote, x, y)
{
this.BackColor = Color.Black;
this.Size = new System.Drawing.Size(20, 60);
}
}
Program Class
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}

According to Form1 class code, there is constructor missing. Please add proper constructor with InitializeComponent() method call. It can be added anywhere in class body.
Code snippet:
public partial class Form1 : Form
{
[...] //your objects declarations
public Form1()
{
InitializeComponent();
}
[...] //rest of your code
}

How to set size of object on form in c#?

I have panel and Datagridview on Form, panel is for sliding up and down to show and hide its contents.
When I click on show button it executes this code:
private void button1_Click(object sender, EventArgs e)
{
if (hidded)
{
button1.Visible = false;
button2.Visible = true;
}
else
{
button1.Visible = true;
button2.Visible = false;
}
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
if (hidded)
{
Spanel.Height = Spanel.Height + 20;
Datagridview1.Location = new Point(23 , Datagridview1.Location.Y + 20);
if (Spanel.Height >= 140)
{
timer1.Stop();
hidded = false;
this.Refresh();
}
}
else
{
Spanel.Height = Spanel.Height - 20;
Datagridview1.Location = new Point( 23, Datagridview1.Location.Y - 20);
if (Spanel.Height <= 0)
{
timer1.Stop();
hidded = true;
this.Refresh();
}
}
}
when i try to hide/close panel the Datagridview moves up and become like this:
I just need to fix anchor size or datagridview location from down.

If you want to do it your way (with timer) just change your timer tick event handler to the code bellow. It will also change the size of the DataGridView alongside with its position.
private void timer1_Tick(object sender, EventArgs e)
{
if (hidded)
{
Spanel.Height = Spanel.Height + 20;
Datagridview1.Location = new Point(23, Datagridview1.Location.Y + 20);
Datagridview1.Size = new Size(Datagridview1.Width, Datagridview1.Height - 20);
if (Spanel.Height >= 140)
{
timer1.Stop();
hidded = false;
this.Refresh();
}
}
else
{
Spanel.Height = Spanel.Height - 20;
Datagridview1.Location = new Point(23, Datagridview1.Location.Y - 20);
Datagridview1.Size = new Size(Datagridview1.Width, Datagridview1.Height + 20);
if (Spanel.Height <= 0)
{
timer1.Stop();
hidded = true;
this.Refresh();
}
}
}
My approach to this problem would be a bit different and if u don't mind i will let it here. Instead of anchoring i would do it like this(see the pic bellow) using docking. It should work the same using the code you posted (Your SPanel is Panel2 on the picture).
Edit #1: For fluently moving or resizing controls in your WinForm app i recommend you to use this library: https://github.com/UweKeim/dot-net-transitions. Using the mentioned library your button click event hanlder would look something like this:
private bool resizing = false;
private void button1_Click(object sender, EventArgs e)
{
if (resizing)
return;
resizing = true;
Transition t = new Transition(new TransitionType_Acceleration(600));
t.TransitionCompletedEvent += (snd, ea) => { resizing = false; };
t.add(panel2, "Height", panel2.Height == 0 ? 250 : 0);
t.run();
}

Building a typing game in C#

a few days back i started reading Head first C#, i use visual c# 2015 for building code and learning C# but however the book is based on visual studio 2010, i never ran into any problem so far while learning until i ran into this exercise when i have to build a typing game, i followed all the procedure as mentioned by the book and built it with no errors. but in the end when i run the code a key press from the keyboard should initialize the game but nothing seems t o start the game not even a mouse click or even from virtual keyboard.
Here is the code
namespace WindowsFormsApplication15{
public partial class Form1 : Form
{
Random random = new Random();
Stats stats = new Stats();
public Form1()
{
InitializeComponent();
}
private void timer1_Tick(object sender, EventArgs e)
{
listBox1.Items.Add((Keys)random.Next(65, 70));
if (listBox1.Items.Count > 7)
{
listBox1.Items.Clear();
listBox1.Items.Add("Game over");
timer1.Stop();
}
}
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (listBox1.Items.Contains(e.KeyCode))
{
listBox1.Items.Remove(e.KeyCode);
listBox1.Refresh();
if (timer1.Interval > 400)
timer1.Interval -= 10;
if (timer1.Interval > 250)
timer1.Interval -= 7;
if (timer1.Interval > 100)
timer1.Interval -= 2;
difficultyProgressBar.Value = 800 - timer1.Interval;
stats.Update(true);
}
else
{
stats.Update(false);
}
correctLabel.Text = "Correct:" + stats.Correct;
missedLabel.Text = "Missed:" + stats.Missed;
totalLabel.Text = "Total:" + stats.Total;
accuracyLabel.Text = "Accuracy:" + stats.Accuracy + "%";
}
}
}
class for the code
namespace WindowsFormsApplication15{
class Stats
{
public int Total = 0;
public int Missed = 0;
public int Correct = 0;
public int Accuracy = 0;
public void Update(bool correctKey)
{
Total++;
if (!correctKey)
{
Missed++;
}
else
{
Correct++;
}
Accuracy = 100 * Correct / (Missed + Correct);
}
}
}
Form designer code
namespace WindowsFormsApplication15{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.listBox1 = new System.Windows.Forms.ListBox();
this.timer1 = new System.Windows.Forms.Timer(this.components);
this.statusStrip1 = new System.Windows.Forms.StatusStrip();
this.correctLabel = new System.Windows.Forms.ToolStripStatusLabel();
this.missedLabel = new System.Windows.Forms.ToolStripStatusLabel();
this.totalLabel = new System.Windows.Forms.ToolStripStatusLabel();
this.accuracyLabel = new System.Windows.Forms.ToolStripStatusLabel();
this.toolStripStatusLabel1 = new System.Windows.Forms.ToolStripStatusLabel();
this.difficultyProgressBar = new System.Windows.Forms.ToolStripProgressBar();
this.statusStrip1.SuspendLayout();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.Dock = System.Windows.Forms.DockStyle.Fill;
this.listBox1.Font = new System.Drawing.Font("Microsoft Sans Serif", 80.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.listBox1.FormattingEnabled = true;
this.listBox1.ItemHeight = 120;
this.listBox1.Location = new System.Drawing.Point(0, 0);
this.listBox1.MultiColumn = true;
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(887, 261);
this.listBox1.TabIndex = 0;
//
// timer1
//
this.timer1.Interval = 800;
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
//
// statusStrip1
//
this.statusStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.correctLabel,
this.missedLabel,
this.totalLabel,
this.accuracyLabel,
this.toolStripStatusLabel1,
this.difficultyProgressBar});
this.statusStrip1.Location = new System.Drawing.Point(0, 239);
this.statusStrip1.Name = "statusStrip1";
this.statusStrip1.Size = new System.Drawing.Size(887, 22);
this.statusStrip1.SizingGrip = false;
this.statusStrip1.TabIndex = 1;
this.statusStrip1.Text = "statusStrip1";
//
// correctLabel
//
this.correctLabel.Name = "correctLabel";
this.correctLabel.Size = new System.Drawing.Size(58, 17);
this.correctLabel.Text = "Correct: 0";
//
// missedLabel
//
this.missedLabel.Name = "missedLabel";
this.missedLabel.Size = new System.Drawing.Size(56, 17);
this.missedLabel.Text = "Missed: 0";
//
// totalLabel
//
this.totalLabel.Name = "totalLabel";
this.totalLabel.Size = new System.Drawing.Size(45, 17);
this.totalLabel.Text = "Total: 0";
//
// accuracyLabel
//
this.accuracyLabel.Name = "accuracyLabel";
this.accuracyLabel.Size = new System.Drawing.Size(78, 17);
this.accuracyLabel.Text = "Accuracy: 0%";
//
// toolStripStatusLabel1
//
this.toolStripStatusLabel1.Name = "toolStripStatusLabel1";
this.toolStripStatusLabel1.Size = new System.Drawing.Size(533, 17);
this.toolStripStatusLabel1.Spring = true;
this.toolStripStatusLabel1.Text = "Difficulty";
this.toolStripStatusLabel1.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
//
// difficultyProgressBar
//
this.difficultyProgressBar.Name = "difficultyProgressBar";
this.difficultyProgressBar.Size = new System.Drawing.Size(100, 16);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(887, 261);
this.Controls.Add(this.statusStrip1);
this.Controls.Add(this.listBox1);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "Form1";
this.Text = "Form1";
this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
this.statusStrip1.ResumeLayout(false);
this.statusStrip1.PerformLayout();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.Timer timer1;
private System.Windows.Forms.StatusStrip statusStrip1;
private System.Windows.Forms.ToolStripStatusLabel correctLabel;
private System.Windows.Forms.ToolStripStatusLabel missedLabel;
private System.Windows.Forms.ToolStripStatusLabel totalLabel;
private System.Windows.Forms.ToolStripStatusLabel accuracyLabel;
private System.Windows.Forms.ToolStripStatusLabel toolStripStatusLabel1;
private System.Windows.Forms.ToolStripProgressBar difficultyProgressBar;
}
}
I just started learning C# and working with visual studio this month, i don't know much about programming
My guess is the problem lies some where with the KeyDown event

In all of that code I cannot see where timer1 is started - try adding
timer1.Start();
after InitializeComponent();

The problem is simple - your input focus is on the listbox. The guy who wrote the sample probably didn't test it all that much, or you didn't follow the procedure precisely enough :)
To make sure the form receives key press on a child control, you need to set the form's KeyPreview property to true.
Also, as PaulF noted, you never start the timer. The simplest solution is to set Enabled to true.

I'm late to this, but here's what I've got. I'm working through the same book and ran into the same problem, which is that the instructions tell you to set the listbox font at 72pt size. This makes the letters too large to display properly in the listbox on the form, and the Dock Fill property (or some other property, I'm new at C#) causes the ListBox (and its contents) to not display on the form during runtime.
The fix was to reduce ListBox1's font size down to the next size down, at 48pt.

I had the same problem and I had to set the timer to start or enabled and also set the font size to 48pt.
Add one of these lines in Form1.cs underneath InitializeComponent().
this.timer1.Enabled = true;
this.timer1.Start();