ScreenCaptureApp/ResultForm.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace ScreenCaptureApp
{
    public partial class ResultForm : Form
    {
        public ResultForm(Image capturedImage)
        {
            InitializeComponent();
            pictureBox1.Image = capturedImage;
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.OK;
            this.Close();
        }

        private void btnCopy_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.Yes;
            this.Close();
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.Cancel;
            this.Close();
        }
    }
}