using System;
  using System.Drawing;
  using System.Collections;
  using System.ComponentModel;
  using System.Windows.Forms;
  using System.Data;

  public class Form1 : System.Windows.Forms.Form
  {
    private Button myButton; 

    public Form1()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
        
            this.ShowInTaskbar=false;

      myButton = new Button();
      myButton.Text = "Minimize the window and you won't find it in TaskBar";
      myButton.Location = new System.Drawing.Point(64, 32);
      myButton.Size = new System.Drawing.Size(450, 50);
 
      Controls.Add(myButton);
    }

    static void Main() 
    {
      Application.Run(new Form1());
    }
  }

           
          

   
 


using System;
using System.Drawing;
using System.Windows.Forms;
   
class HowdyWorldFullFit: Form
{
     public static void Main()
     {
          Application.Run(new HowdyWorldFullFit());
     }
     public HowdyWorldFullFit()
     {
          ResizeRedraw = true; 
          MinimumSize = SystemInformation.MinimumWindowSize + new Size(0,1);
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }     
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Font  font  = new Font("Times New Roman", 10, FontStyle.Italic);
          SizeF sizef = grfx.MeasureString(Text, font);
          float fScaleHorz = cx / sizef.Width;
          float fScaleVert = cy / sizef.Height;
   
          grfx.ScaleTransform(fScaleHorz, fScaleVert);
   
          grfx.DrawString(Text, font, new SolidBrush(clr), 0, 0);
     }
}

    

   

// This Article is a simple one to show the usage of KeyEvent and MouseEvent. 
  
// Please move the mouse or press a key to Exit this Program. 
using System; 
using System.Drawing; 
using System.Collections; 
using System.ComponentModel; 
using System.Windows.Forms; 
using System.Data; 

namespace ScreenSave 
{ 
    public class KeyEventandMouseEvent : System.Windows.Forms.Form { 
        private System.Windows.Forms.Label label1; 
        private System.Windows.Forms.Timer timer1; 
        private System.ComponentModel.IContainer components; 
        private Boolean boolFlag; 
        private int ixStart; 
        private int iyStart; 
    
        public KeyEventandMouseEvent() { 
            // 
            // Required for Windows Form Designer support 
            // 
            InitializeComponent(); 
        } 
        /// <summary> 
        /// Clean up any resources being used. 
        /// </summary> 
        protected override void Dispose( bool disposing ) 
        { 
            if( disposing ) { 
                if (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.timer1 = new System.Windows.Forms.Timer(this.components); 
            this.label1 = new System.Windows.Forms.Label(); 
            this.SuspendLayout(); 
            // 
            // timer1 
            // 
            this.timer1.Enabled = true; 
            this.timer1.Tick += new System.EventHandler(this.timer1_Tick); 
            // 
            // label1 
            // 
            this.label1.Font = new System.Drawing.Font("Times New Roman", 14F, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic), System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); 
            this.label1.ForeColor = System.Drawing.Color.Lime; 
            this.label1.Location = new System.Drawing.Point(8, 280); 
            this.label1.Name = "label1"; 
            this.label1.Size = new System.Drawing.Size(312, 32); 
            this.label1.TabIndex = 0; 
            this.label1.Text = "Roller - Developed in C-Sharp"; 
            this.label1.Click += new System.EventHandler(this.label1_Click); 
            // 
            // KeyEventandMouseEvent 
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); 
            this.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(64)), ((System.Byte)(64)), ((System.Byte)(64))); 
            this.ClientSize = new System.Drawing.Size(568, 32); 
            this.Controls.AddRange(new System.Windows.Forms.Control[] { 
            this.label1}); 
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None; 
            this.KeyPreview = true; 
            this.Name = "KeyEventandMouseEvent"; 
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; 
            this.Text = "KeyEventandMouseEvent"; 
            this.WindowState = System.Windows.Forms.FormWindowState.Maximized; 
            this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.OnKeyPressEvent); 
            this.Load += new System.EventHandler(this.KeyEventandMouseEvent_Load); 
            this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.OnMouseMoveEvent); 
            this.ResumeLayout(false); 
        } 
        #endregion 
        /// <summary> 
        /// The main entry point for the application. 
        /// </summary> 
        [STAThread] 
        static void Main() 
        { 
            Application.Run(new KeyEventandMouseEvent()); 
        } 
        private void timer1_Tick(object sender, System.EventArgs e) 
        { 
            int i; 
              
            i = label1.Location.X; 
            if (i >= 750) 
            i = 0; 
            else 
            i = label1.Location.X + 5; 
              
            label1.Location = new Point(i,280); 
        } 
        private void KeyEventandMouseEvent_Load(object sender, System.EventArgs e) 
        { 
          
        } 
        private void OnMouseMoveEvent(object sender,MouseEventArgs e) 
        { 
            //Application.Exit(); 
            if (ixStart == 0 &amp;&amp; iyStart == 0) 
            { 
                ixStart = e.X; 
                iyStart = e.Y; 
            } 
            else if (e.X != ixStart || e.Y != iyStart) 
                Application.Exit(); 
              
        } 
        private void OnKeyPressEvent(object sender, System.Windows.Forms.KeyPressEventArgs e) 
        { 
            Application.Exit(); 
        } 
        private void label1_Click(object sender, System.EventArgs e) 
        { 
        } 
    } 
} 
 



           
          

   


using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class Form1 : System.Windows.Forms.Form {
    private System.Windows.Forms.GroupBox groupBox1;
    private System.Windows.Forms.CheckBox checkBox1;
    private System.Windows.Forms.CheckBox checkBox2;
    private System.Windows.Forms.CheckBox checkBox3;
    private System.Windows.Forms.RadioButton radioButton1;
    private System.Windows.Forms.RadioButton radioButton2;
    private System.Windows.Forms.RadioButton radioButton3;
    private System.Windows.Forms.Button button1;

    private System.ComponentModel.Container components = null;

    public Form1() {
      InitializeComponent();
    }

    private void InitializeComponent() {
            this.groupBox1 = new System.Windows.Forms.GroupBox();
            this.checkBox1 = new System.Windows.Forms.CheckBox();
            this.checkBox2 = new System.Windows.Forms.CheckBox();
            this.checkBox3 = new System.Windows.Forms.CheckBox();
            this.radioButton1 = new System.Windows.Forms.RadioButton();
            this.radioButton2 = new System.Windows.Forms.RadioButton();
            this.radioButton3 = new System.Windows.Forms.RadioButton();
            this.button1 = new System.Windows.Forms.Button();
            this.groupBox1.SuspendLayout();
            this.SuspendLayout();
            // 
            // groupBox1
            // 
            this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                                    this.radioButton1,
                                                                                    this.radioButton2,
                                                                                    this.radioButton3});
            this.groupBox1.Location = new System.Drawing.Point(8, 120);
            this.groupBox1.Name = "groupBox1";
            this.groupBox1.Size = new System.Drawing.Size(120, 144);
            this.groupBox1.TabIndex = 0;
            this.groupBox1.TabStop = false;
            this.groupBox1.Text = "Color";
            this.groupBox1.Enter += new System.EventHandler(this.groupBox1_Enter);
            // 
            // checkBox1
            // 
            this.checkBox1.Location = new System.Drawing.Point(8, 8);
            this.checkBox1.Name = "checkBox1";
            this.checkBox1.TabIndex = 1;
            this.checkBox1.Text = "Circle";
            // 
            // checkBox2
            // 
            this.checkBox2.Location = new System.Drawing.Point(8, 40);
            this.checkBox2.Name = "checkBox2";
            this.checkBox2.TabIndex = 2;
            this.checkBox2.Text = "Rectangle";
            // 
            // checkBox3
            // 
            this.checkBox3.Location = new System.Drawing.Point(8, 72);
            this.checkBox3.Name = "checkBox3";
            this.checkBox3.TabIndex = 3;
            this.checkBox3.Text = "String";
            // 
            // radioButton1
            // 
            this.radioButton1.Location = new System.Drawing.Point(8, 32);
            this.radioButton1.Name = "radioButton1";
            this.radioButton1.TabIndex = 4;
            this.radioButton1.Text = "Red";
            this.radioButton1.CheckedChanged += new System.EventHandler(this.radioButton1_CheckedChanged);
            // 
            // radioButton2
            // 
            this.radioButton2.Location = new System.Drawing.Point(8, 64);
            this.radioButton2.Name = "radioButton2";
            this.radioButton2.TabIndex = 5;
            this.radioButton2.Text = "Green";
            // 
            // radioButton3
            // 
            this.radioButton3.Location = new System.Drawing.Point(8, 96);
            this.radioButton3.Name = "radioButton3";
            this.radioButton3.TabIndex = 6;
            this.radioButton3.Text = "Blue";
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(8, 280);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(112, 32);
            this.button1.TabIndex = 4;
            this.button1.Text = "Draw";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(408, 317);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.button1,
                                                                          this.checkBox3,
                                                                          this.checkBox2,
                                                                          this.checkBox1,
                                                                          this.groupBox1});
            this.Name = "Form1";
            this.Text = "CheckBox and RadioButton Sample";
            this.groupBox1.ResumeLayout(false);
            this.ResumeLayout(false);

        }

        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        private void groupBox1_Enter(object sender, System.EventArgs e)
        {
           Console.WriteLine("group box enter event");
        }

        private void radioButton1_CheckedChanged(object sender, System.EventArgs e)
        {
           Console.WriteLine("Radio Button checked changed event");
        }

        private void button1_Click(object sender, System.EventArgs e)
        {
            Graphics g = Graphics.FromHwnd(this.Handle);
            String str = "";
            Rectangle rc = new Rectangle(150, 50, 250, 250);
            
            if(radioButton1.Checked)
            {
                str = "red";
            }
            if(radioButton2.Checked)
            {
                str+="Green";
            }
            if(radioButton3.Checked)
            {
                str+="Blue";
            }

            if (checkBox1.Checked)
            {
                str+="Ellipse";
            }
            if (checkBox2.Checked)
            {
                str += "Rectangle";
            }
            if (checkBox3.Checked)
            {
                g.FillRectangle(new SolidBrush(Color.White), rc);
                g.DrawString(str, new Font("Verdana", 12), new SolidBrush(Color.Black), rc);
            }
            

        }
    }


           
          

   

using System;
using System.Windows.Forms;
using System.Drawing;

public class PushMe2 : Form {

  Button pushMeButton;

  public PushMe2() {
    pushMeButton = new Button(); 
    pushMeButton.Text = "Push Me";
    pushMeButton.Height = 60;
    pushMeButton.Width = 80;
    pushMeButton.Top = 60;
    pushMeButton.Left = 60;

    pushMeButton.Click += new EventHandler(ButtonClicked);

    this.Controls.Add(pushMeButton);

    this.Height = 200;
    this.Width = 200;
    this.StartPosition = FormStartPosition.CenterScreen;
    this.Visible = true;
  }

  public void ButtonClicked(object source, EventArgs e) {
    Button b = (Button)source;
    if ( b.Text == "Push Me" ) {
      b.Text = "Ouch";
    }
    else {
      b.Text = "Push Me";
    }
  }

  static void Main() {
    Application.Run(new PushMe2());
  }
}


           
          

   

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class Form1 : System.Windows.Forms.Form{
    private System.ComponentModel.IContainer components;

  public Form1(){
    InitializeComponent();
  }


  #region Windows Form Designer generated code
  private void InitializeComponent(){
      this.components = new System.ComponentModel.Container();
      this.timer1 = new System.Windows.Forms.Timer(this.components);

      this.timer1.Enabled = true;
      this.timer1.Tick += new System.EventHandler(this.timer1_Tick);

      this.AutoScaleBaseSize = new System.Drawing.Size(6, 15);
      this.ClientSize = new System.Drawing.Size(292, 260);
      this.Name = "Form1";
      this.Text = "LinearGradientBrush Demo";
      this.Load += new System.EventHandler(this.Form1_Load);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);

    }
  #endregion

  static void Main(){
    Application.Run(new Form1());
  }

    private void Form1_Load(object sender, System.EventArgs e) {
      this.BackColor = Color.FromArgb(255, 0, 0, 255);  
    }

    private System.Windows.Forms.Timer timer1;

    private float angle = 0;

    private LinearGradientBrush GetBrush()
    {
      return new LinearGradientBrush(
        new Rectangle( 20, 20, 200, 100),
        Color.Orange,
        Color.Yellow,
        0.0F,
        true);
    }


    private void Rotate( Graphics graphics, LinearGradientBrush brush )
    {
      brush.RotateTransform(angle);
      brush.SetBlendTriangularShape(.5F);
      graphics.FillRectangle(brush, brush.Rectangle);
    }

    private void Rotate(Graphics graphics)
    {
      angle += 5 % 360;
      Rotate(graphics, GetBrush());
    }

    private void timer1_Tick(object sender, System.EventArgs e)
    {
      Rotate(CreateGraphics());
    }

    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {
      Rotate(e.Graphics);
    }
}



           
          

   

public class MyForm : System.Windows.Forms.Form{
  public MyForm(){
    Text = "Hello World";
  }
  public static void Main() {
    System.Windows.Forms.Application.Run(new MyForm());
  }
}