private void MostrarUsuarios()
        {
            DataTable dt      = new DataTable();
            Dusuarios funcion = new Dusuarios();

            funcion.mostrar_Usuarios(ref dt);
            Contador = dt.Rows.Count;
        }
        private void DibujarUsuarios()
        {
            try
            {
                PanelUsuarios.Visible = true;
                PanelUsuarios.Dock    = DockStyle.Fill;
                PanelUsuarios.BringToFront();
                DataTable dt      = new DataTable();
                Dusuarios funcion = new Dusuarios();
                funcion.mostrar_Usuarios(ref dt);
                foreach (DataRow rdr in dt.Rows)
                {
                    Label      b  = new Label();
                    Panel      p1 = new Panel();
                    PictureBox I1 = new PictureBox();
                    b.Text      = rdr["Login"].ToString();
                    b.Name      = rdr["idUsuario"].ToString();
                    b.Size      = new Size(175, 25);
                    b.Font      = new Font("Microsoft Sans Serif", 13);
                    b.BackColor = Color.Transparent;
                    b.ForeColor = Color.White;
                    b.Dock      = DockStyle.Bottom;
                    b.TextAlign = ContentAlignment.MiddleCenter;
                    b.Cursor    = Cursors.Hand;

                    p1.Size        = new Size(155, 167);
                    p1.BorderStyle = BorderStyle.None;
                    p1.BackColor   = Color.FromArgb(20, 20, 20);

                    I1.Size            = new Size(175, 132);
                    I1.Dock            = DockStyle.Top;
                    I1.BackgroundImage = null;
                    byte[]       bi = (Byte[])rdr["Icono"];
                    MemoryStream ms = new MemoryStream(bi);
                    I1.Image    = Image.FromStream(ms);
                    I1.SizeMode = PictureBoxSizeMode.Zoom;
                    I1.Tag      = rdr["Login"].ToString();
                    I1.Cursor   = Cursors.Hand;

                    p1.Controls.Add(b);
                    p1.Controls.Add(I1);
                    b.BringToFront();

                    flowLayoutPanel1.Controls.Add(p1);


                    I1.Click += miEventoImagen;
                }
            }
            catch (Exception)
            {
            }
        }