EmbeddedForms

//Form designer partial class.
//CHANGE NAMESPACE NAME
namespace EmbeddedForms
{
    partial class frmEmbeddedForms
    {
        private System.ComponentModel.IContainer components = null;

        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        private void InitializeComponent()
        {
            this.panTitleBar = new System.Windows.Forms.Panel();
            this.lblTitle = new System.Windows.Forms.Label();
            this.panContainer = new System.Windows.Forms.Panel();
            this.panSideBar = new System.Windows.Forms.Panel();
            this.btnHideSideBar = new System.Windows.Forms.Button();
            this.btnNoBorder = new System.Windows.Forms.Button();
            this.btnEmbedForm = new System.Windows.Forms.Button();
            this.panTitleBar.SuspendLayout();
            this.panSideBar.SuspendLayout();
            this.SuspendLayout();
            //
            // panTitleBar
            //
            this.panTitleBar.BackColor = System.Drawing.Color.OliveDrab;
            this.panTitleBar.Controls.Add(this.lblTitle);
            this.panTitleBar.Dock = System.Windows.Forms.DockStyle.Top;
            this.panTitleBar.Location = new System.Drawing.Point(0, 0);
            this.panTitleBar.Name = "panTitleBar";
            this.panTitleBar.Size = new System.Drawing.Size(626, 56);
            this.panTitleBar.TabIndex = 1;
            //
            // lblTitle
            //
            this.lblTitle.Font = new System.Drawing.Font("Segoe UI", 20.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.lblTitle.Location = new System.Drawing.Point(27, 9);
            this.lblTitle.Name = "lblTitle";
            this.lblTitle.Size = new System.Drawing.Size(231, 38);
            this.lblTitle.TabIndex = 0;
            this.lblTitle.Text = "Title Bar";
            //
            // panContainer
            //
            this.panContainer.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(64)))), ((int)(((byte)(64)))), ((int)(((byte)(64)))));
            this.panContainer.Dock = System.Windows.Forms.DockStyle.Fill;
            this.panContainer.Location = new System.Drawing.Point(145, 56);
            this.panContainer.Name = "panContainer";
            this.panContainer.Size = new System.Drawing.Size(481, 347);
            this.panContainer.TabIndex = 2;
            this.panContainer.Resize += new System.EventHandler(this.panContainer_Resize);
            //
            // panSideBar
            //
            this.panSideBar.Controls.Add(this.btnHideSideBar);
            this.panSideBar.Controls.Add(this.btnNoBorder);
            this.panSideBar.Controls.Add(this.btnEmbedForm);
            this.panSideBar.Dock = System.Windows.Forms.DockStyle.Left;
            this.panSideBar.Location = new System.Drawing.Point(0, 56);
            this.panSideBar.Name = "panSideBar";
            this.panSideBar.Size = new System.Drawing.Size(145, 347);
            this.panSideBar.TabIndex = 3;
            //
            // btnHideSideBar
            //
            this.btnHideSideBar.FlatAppearance.BorderSize = 0;
            this.btnHideSideBar.FlatAppearance.MouseDownBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(32)))), ((int)(((byte)(32)))), ((int)(((byte)(32)))));
            this.btnHideSideBar.FlatAppearance.MouseOverBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(64)))), ((int)(((byte)(64)))), ((int)(((byte)(64)))));
            this.btnHideSideBar.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
            this.btnHideSideBar.Font = new System.Drawing.Font("Wingdings", 18F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(2)));
            this.btnHideSideBar.ForeColor = System.Drawing.Color.White;
            this.btnHideSideBar.Location = new System.Drawing.Point(117, 0);
            this.btnHideSideBar.Name = "btnHideSideBar";
            this.btnHideSideBar.Size = new System.Drawing.Size(29, 31);
            this.btnHideSideBar.TabIndex = 50;
            this.btnHideSideBar.Text = "ï";
            this.btnHideSideBar.UseVisualStyleBackColor = true;
            this.btnHideSideBar.Click += new System.EventHandler(this.btnHideSideBar_Click);
            this.btnHideSideBar.MouseDown += new System.Windows.Forms.MouseEventHandler(this.btnHideSideBar_MouseDown);
            this.btnHideSideBar.MouseUp += new System.Windows.Forms.MouseEventHandler(this.btnHideSideBar_MouseUp);
            //
            // btnNoBorder
            //
            this.btnNoBorder.Enabled = false;
            this.btnNoBorder.FlatAppearance.BorderSize = 0;
            this.btnNoBorder.FlatAppearance.MouseDownBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(64)))), ((int)(((byte)(0)))));
            this.btnNoBorder.FlatAppearance.MouseOverBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(64)))), ((int)(((byte)(0)))));
            this.btnNoBorder.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
            this.btnNoBorder.Font = new System.Drawing.Font("Segoe UI", 11.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.btnNoBorder.ForeColor = System.Drawing.Color.White;
            this.btnNoBorder.Location = new System.Drawing.Point(0, 126);
            this.btnNoBorder.Name = "btnNoBorder";
            this.btnNoBorder.Size = new System.Drawing.Size(145, 35);
            this.btnNoBorder.TabIndex = 49;
            this.btnNoBorder.Text = "No Border";
            this.btnNoBorder.UseVisualStyleBackColor = true;
            this.btnNoBorder.Click += new System.EventHandler(this.btnNoBorder_Click);
            //
            // btnEmbedForm
            //
            this.btnEmbedForm.FlatAppearance.BorderColor = System.Drawing.Color.White;
            this.btnEmbedForm.FlatAppearance.BorderSize = 0;
            this.btnEmbedForm.FlatAppearance.MouseDownBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(64)))), ((int)(((byte)(0)))));
            this.btnEmbedForm.FlatAppearance.MouseOverBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(64)))), ((int)(((byte)(0)))));
            this.btnEmbedForm.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
            this.btnEmbedForm.Font = new System.Drawing.Font("Segoe UI", 11.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.btnEmbedForm.ForeColor = System.Drawing.Color.White;
            this.btnEmbedForm.Location = new System.Drawing.Point(0, 70);
            this.btnEmbedForm.Name = "btnEmbedForm";
            this.btnEmbedForm.Size = new System.Drawing.Size(145, 35);
            this.btnEmbedForm.TabIndex = 48;
            this.btnEmbedForm.Text = "Embed Form";
            this.btnEmbedForm.UseVisualStyleBackColor = true;
            this.btnEmbedForm.Click += new System.EventHandler(this.btnEmbedForm_Click);
            //
            // frmEmbeddedForms
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(32)))), ((int)(((byte)(32)))), ((int)(((byte)(32)))));
            this.ClientSize = new System.Drawing.Size(626, 403);
            this.Controls.Add(this.panContainer);
            this.Controls.Add(this.panSideBar);
            this.Controls.Add(this.panTitleBar);
            this.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.ForeColor = System.Drawing.Color.White;
            this.Name = "frmEmbeddedForms";
            this.ShowInTaskbar = false;
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "frmEmbeddedForms";
            this.panTitleBar.ResumeLayout(false);
            this.panSideBar.ResumeLayout(false);
            this.ResumeLayout(false);

        }

        #endregion
        private System.Windows.Forms.Panel panTitleBar;
        private System.Windows.Forms.Label lblTitle;
        private System.Windows.Forms.Panel panContainer;
        private System.Windows.Forms.Panel panSideBar;
        private System.Windows.Forms.Button btnEmbedForm;
        private System.Windows.Forms.Button btnNoBorder;
        private System.Windows.Forms.Button btnHideSideBar;
    }
}


//Form code
using System;
using System.Collections.Generic;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

//CHANGE NAMESPACE NAME
namespace EmbeddedForms
{
    public partial class frmEmbeddedForms : Form
    {
        System.Windows.Forms.Timer timer;
        //Define here the Form class to be embedded
        [Your Form Class] EmbeddedForm;

        public frmEmbeddedForms(Form MainForm) => InitializeComponent();

        private void btnEmbedForm_Click(object sender, EventArgs e)
        {
            EmbeddedForm = new [Your Form Class]() {
                TopLevel = false,
                Parent = panContainer,
                Location = new Point(4, 4),
                Enabled = true
            };
            EmbeddedForm.Show();
        }

        private void btnNoBorder_Click(object sender, EventArgs e)
        {
            //Position (to compensate) the embedded Form when its borders are hidden
            EmbeddedForm.Location = new Point(6, 6);
            EmbeddedForm.FormBorderStyle = FormBorderStyle.None;
        }

        private void btnHideSideBar_Click(object sender, EventArgs e)
        {
            //This timer slides the SideBar left. Another one is needed to slide right (if required)
            timer = new Timer();
            timer.Interval = 50;
            timer.Tick += (s, ev) =>
            {
                //Simply resize the SideBar
                //panSideBar.Width -= 5;
                //Or, slide the Panel's controls
                SideBar_SlideControls();
                if (panSideBar.Width <= 6)
                {
                    panSideBar.Width = 6;
                    timer.Stop();
                    timer.Dispose();  //!important
                }
            };
            timer.Start();
        }

        private void SideBar_SlideControls()
        {
            this.panSideBar.Controls.OfType<Control>().Select(ctl => ctl.Left -= 5).ToList();
            this.panSideBar.Width -= 5;
            panSideBar.Update();
        }

        private void panContainer_Resize(object sender, EventArgs e)
        {
            //Resizes the embedded Form when the host panel resizes
            Rectangle rect = panContainer.ClientRectangle;
            rect.Inflate(-3, -3);
            EmbeddedForm.Size = rect.Size;
        }

        private void btnHideSideBar_MouseDown(object sender, MouseEventArgs e)
        {
            btnHideSideBar.FlatAppearance.BorderSize = 1;
        }

        private void btnHideSideBar_MouseUp(object sender, MouseEventArgs e)
        {
            btnHideSideBar.FlatAppearance.BorderSize = 0;
        }
    }
}