private void thietbiGUI_Load(object sender, EventArgs e)
{
quanlythietbiUC tb = new quanlythietbiUC();
tb.Dock = System.Windows.Forms.DockStyle.Fill;
pnmain.Controls.Add(tb);
}
private void btthietbi_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
pnmain.Controls.Clear();
quanlythietbiUC tb = new quanlythietbiUC();
tb.Dock = System.Windows.Forms.DockStyle.Fill;
pnmain.Controls.Add(tb);
}