private void button1_Click(object sender, EventArgs e)
        {
            fmrtempera   tempera   = new fmrtempera();
            DialogResult resultado = tempera.ShowDialog();

            tempera.Show();

            if (resultado == DialogResult.OK)
            {
                this.mipaleta += tempera.proptempera;

                this.textBox1.Text = tempera.proptempera;
            }
        }
        public Form1()
        {
            mipaleta = 5;


            InitializeComponent();

            this.groupBox1.Text     = "paleta de colores";
            this.textBox1.Multiline = true;
            this.button1.Text       = "+";
            this.button2.Text       = "-";
            this.groupBox1.Visible  = true;
            this.agregarPaletaToolStripMenuItem.Enabled = false;
        }