Panel và FlowLayoutPanel trong lập trình C# Winform

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace PanelGUI
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Button btn = new Button();
            btn.Text = "HowKteam.com";
            btn.AutoSize = true;

            //Random rand = new Random();
            //btn.Location = new Point(rand.Next(0, pnlButton.Size.Width), rand.Next(0, pnlButton.Size.Height));

            //pnlButton.Controls.Add(btn);
            fpnlButton.Controls.Add(btn);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            pnlButton.Enabled = !pnlButton.Enabled;
        }
    }
}
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namespace PanelGUI
{
    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.pnlButton = new System.Windows.Forms.Panel();
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            this.fpnlButton = new System.Windows.Forms.FlowLayoutPanel();
            this.SuspendLayout();
            // 
            // pnlButton
            // 
            this.pnlButton.Enabled = false;
            this.pnlButton.Location = new System.Drawing.Point(12, 34);
            this.pnlButton.Name = "pnlButton";
            this.pnlButton.Size = new System.Drawing.Size(199, 215);
            this.pnlButton.TabIndex = 0;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(12, 5);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 1;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // button2
            // 
            this.button2.Location = new System.Drawing.Point(136, 5);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(75, 23);
            this.button2.TabIndex = 2;
            this.button2.Text = "button2";
            this.button2.UseVisualStyleBackColor = true;
            this.button2.Click += new System.EventHandler(this.button2_Click);
            // 
            // fpnlButton
            // 
            this.fpnlButton.AutoScroll = true;
            this.fpnlButton.FlowDirection = System.Windows.Forms.FlowDirection.TopDown;
            this.fpnlButton.Location = new System.Drawing.Point(217, 34);
            this.fpnlButton.Name = "fpnlButton";
            this.fpnlButton.Size = new System.Drawing.Size(220, 215);
            this.fpnlButton.TabIndex = 3;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(513, 261);
            this.Controls.Add(this.fpnlButton);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.pnlButton);
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.Panel pnlButton;
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.Button button2;
        private System.Windows.Forms.FlowLayoutPanel fpnlButton;
    }
}

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