UserControl1.cs

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;
using System.IO;
using System.Runtime.Remoting;
using System.Runtime.Serialization.Formatters.Binary;

namespace SaveRestoreSplitterPosition {
    /// <summary>
    /// Summary description for UserControl1.
    /// </summary>
    public class UserControl1 : System.Windows.Forms.UserControl {
        private DevExpress.XtraEditors.SplitContainerControl splitContainerControl1;
        /// <summary> 
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        public UserControl1() {
            // This call is required by the Windows.Forms Form Designer.
            InitializeComponent();

            // TODO: Add any initialization after the InitializeComponent call

        }
        protected override void OnLoad(EventArgs e) {
            base.OnLoad(e);
            this.SizeChanged += UserControl1_SizeChanged;
        }
        private void UserControl1_SizeChanged(object sender, EventArgs e) {
            this.SizeChanged -= UserControl1_SizeChanged;
            splitContainerControl1.SplitterPosition = Settings.Default.SavedSplitterPosition;
        }

        /// <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 Component 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.splitContainerControl1 = new DevExpress.XtraEditors.SplitContainerControl();
            ((System.ComponentModel.ISupportInitialize)(this.splitContainerControl1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.splitContainerControl1.Panel1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.splitContainerControl1.Panel2)).BeginInit();
            this.splitContainerControl1.SuspendLayout();
            this.SuspendLayout();
            // 
            // splitContainerControl1
            // 
            this.splitContainerControl1.DataBindings.Add(new System.Windows.Forms.Binding("SplitterPosition", global::SaveRestoreSplitterPosition.Settings.Default, "SavedSplitterPosition", true, System.Windows.Forms.DataSourceUpdateMode.OnPropertyChanged));
            this.splitContainerControl1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.splitContainerControl1.Location = new System.Drawing.Point(0, 0);
            this.splitContainerControl1.Name = "splitContainerControl1";
            // 
            // splitContainerControl1.Panel1
            // 
            this.splitContainerControl1.Panel1.Appearance.BackColor = System.Drawing.Color.Lime;
            this.splitContainerControl1.Panel1.Appearance.Options.UseBackColor = true;
            this.splitContainerControl1.Panel1.Text = "splitContainerControl1_Panel1";
            // 
            // splitContainerControl1.Panel2
            // 
            this.splitContainerControl1.Panel2.Appearance.BackColor = System.Drawing.Color.Red;
            this.splitContainerControl1.Panel2.Appearance.Options.UseBackColor = true;
            this.splitContainerControl1.Panel2.Text = "splitContainerControl1_Panel2";
            this.splitContainerControl1.Size = new System.Drawing.Size(256, 160);
            this.splitContainerControl1.SplitterPosition = global::SaveRestoreSplitterPosition.Settings.Default.SavedSplitterPosition;
            this.splitContainerControl1.TabIndex = 0;
            this.splitContainerControl1.Text = "splitContainerControl1";
            // 
            // UserControl1
            // 
            this.Controls.Add(this.splitContainerControl1);
            this.Name = "UserControl1";
            this.Size = new System.Drawing.Size(256, 160);
            ((System.ComponentModel.ISupportInitialize)(this.splitContainerControl1.Panel1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.splitContainerControl1.Panel2)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.splitContainerControl1)).EndInit();
            this.splitContainerControl1.ResumeLayout(false);
            this.ResumeLayout(false);

        }
        #endregion
    }
}