Csharp/C Sharp by API/System.Windows.Forms/ControlStyles

ControlStyles.Opaque

 
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;
public class Form1 : System.Windows.Forms.Form{
  private System.ruponentModel.Container components = null;
  public Form1(){
    InitializeComponent();
        SetStyle(ControlStyles.Opaque, true);
  }
  protected override void Dispose( bool disposing ){
    if( disposing ){
      if (components != null) 
      {
        components.Dispose();
      }
    }
    base.Dispose( disposing );
  }
    protected override void OnPaint(PaintEventArgs e) {
         Graphics g = e.Graphics;
         g.FillRectangle(Brushes.White, ClientRectangle);
         g.FillEllipse(Brushes.Aquamarine, new Rectangle(60, 20, 50, 30));
    }
  private void InitializeComponent(){
    this.ruponents = new System.ruponentModel.Container();
    this.Size = new System.Drawing.Size(300,300);
    this.Text = "Form1";
  }
  static void Main() {
    Application.Run(new Form1());
  }
}

ControlStyles.ResizeRedraw

  
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class FormStyleResizeRedraw : System.Windows.Forms.Form
{
  private System.Windows.Forms.Button btnGetStyles;
  private System.ruponentModel.Container components = null;
  public FormStyleResizeRedraw()
  {
    InitializeComponent();
    SetStyle(ControlStyles.ResizeRedraw, true);
  }
  protected override void Dispose( bool disposing )
  {
    if( disposing )
    {
      if (components != null) 
      {
        components.Dispose();
      }
    }
    base.Dispose( disposing );
  }
  private void InitializeComponent()
  {
    this.btnGetStyles = new System.Windows.Forms.Button();
    this.btnGetStyles.Location = new System.Drawing.Point(24, 64);
    this.btnGetStyles.Size = new System.Drawing.Size(160, 23);
    this.btnGetStyles.TabIndex = 0;
    this.btnGetStyles.Text = "Get Form Styles";
    this.btnGetStyles.Click += new System.EventHandler(this.btnGetStyles_Click);
    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(211, 104);
    this.Controls.AddRange(new System.Windows.Forms.Control[] {this.btnGetStyles});
    this.Text = "A Form with Style!";

  }
  [STAThread]
  static void Main() 
  {
    Application.Run(new FormStyleResizeRedraw());
  }
  private void btnGetStyles_Click(object sender, System.EventArgs e)
  {
    MessageBox.Show(GetStyle(ControlStyles.ResizeRedraw).ToString(), "Do you have ResizeRedraw?");
  }
}