private void button1_Click(object sender, EventArgs e)
{
this.panelcentral.Controls.Clear();
this.panelaltas.BackColor = this.cnone;
this.panelbajas.BackColor = this.cnone;
this.panelconsultas.BackColor = this.cfondo;
this.spi = new seeproductsinternal(this)
{
TopLevel = false
};
this.panelcentral.Controls.Add(spi);
this.spi.Dock = DockStyle.Fill;
spi.Show();
}
