private void pictureBox4_Click(object sender, EventArgs e)
        {
            frmEmbedFile frm = new frmEmbedFile();

            frm.Show();
            this.Close();
        }
        private void pictureBox3_Click(object sender, EventArgs e)
        {
            frmEmbedFile frmEmbFile = new frmEmbedFile();

            frmEmbFile.Tag = this;
            frmEmbFile.Show(this);
            Hide();
        }
        private void button1_Click(object sender, EventArgs e)

        {
            frmEmbedFile frm = new frmEmbedFile();

            frm.Show();
            this.Close();
        }