using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace SalesClient.Sys

{

   public class AutoSizeFormClass

    {

        public struct controlRect

        {

            public int Left;

            public int Top;

            public int Width;

            public int Height;

        }

        private bool _Flag;

        public bool Flag

        {

            get { return _Flag; }

            set { _Flag = value; }

        }

        private int _Number;

        public int Number

        {

            get { return _Number; }

            set { _Number = value; }

        }

        private List<controlRect> oldCtrl;

        public void Initialize(Form mForm)

        {

            oldCtrl = new List<controlRect>();

            controlRect cR;

            cR.Left = mForm.Left;

            cR.Top = mForm.Top;

            cR.Width = mForm.Width;

            cR.Height = mForm.Height;

            oldCtrl.Add(cR);

            foreach (Control c in mForm.Controls)

            {

                controlRect objCtrl;

                objCtrl.Left = c.Left;

                objCtrl.Top = c.Top;

                objCtrl.Width = c.Width;

                objCtrl.Height = c.Height;

                oldCtrl.Add(objCtrl);

            }

            Flag = true;

            Number = mForm.Controls.Count;

        }

        public void ReSize(Form mForm)

        {

            if (!Flag) return;

            float wScale = (float)mForm.Width / (float)oldCtrl[0].Width;

            float hScale = (float)mForm.Height / (float)oldCtrl[0].Height;

            int ctrLeft0, ctrTop0, ctrWidth0, ctrHeight0;

            int ctrlNo = 1;

            try

            {

                if (mForm.Controls.Count != Number) return;

                foreach (Control c in mForm.Controls)

                {

                    ctrLeft0 = oldCtrl[ctrlNo].Left;

                    ctrTop0 = oldCtrl[ctrlNo].Top;

                    ctrWidth0 = oldCtrl[ctrlNo].Width;

                    ctrHeight0 = oldCtrl[ctrlNo].Height;

                    c.Left = (int)(ctrLeft0 * wScale);

                    c.Top = (int)(ctrTop0 * hScale);

                    c.Width = (int)(ctrWidth0 * wScale);

                    c.Height = (int)(ctrHeight0 * hScale);

                    ctrlNo += 1;

                }

            }

            catch

            {

                return;

            }

        }

    }

}

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

namespace SalesClient.HT
{
    public partial class test : Form
    {
        public test()
        {
            InitializeComponent();
        }
        SalesClient.Sys.AutoSizeFormClass asc = new SalesClient.Sys.AutoSizeFormClass();

private void test_Load(object sender, EventArgs e)
        {
            asc.Initialize(this);
        }

private void test_SizeChanged(object sender, EventArgs e)
        {
            asc.ReSize(this);
        }
    }
}