จะเขียนโค็ดอย่างไรครับเพื่อรับข้อความที่มาจากฟอร์มอื่น

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 ImageGallery
{
    public partial class ViewForm : Form
    {
        private Image theImage;

        public ViewForm(Image MyImage) //<-- method construct
        {
            InitializeComponent();

            theImage = MyImage;

            this.ClientSize = new System.Drawing.Size(theImage.Width + 24, theImage.Height + 24);
            ViewPictureBox.Size = new System.Drawing.Size(theImage.Width, theImage.Height);
        }

        private void ViewForm_Load(object sender, EventArgs e)
        {
            ViewPictureBox.Image = null;
            ViewPictureBox.SizeMode = PictureBoxSizeMode.CenterImage;
            ViewPictureBox.Image = theImage;
        }

        private void ViewPictureBox_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

        private void PictureBox1_Click(object sender, EventArgs e)
        {
            if (PictureBox1.Image != null)
            {
                byte[] imageBytes = Security.DecryptStream(DtImage.Rows[ImageListBox.SelectedIndex]["ImagePath"].ToString(), SecretKey);
 
                Image myImage = Image.FromStream(new MemoryStream(imageBytes));
 
                ViewForm viewForm = new ViewForm(myImage); //<-- ประกาศ instant
                viewForm.ShowDialog();
            }
        }