private void OnQuanLyCa_MouseClick(object sender, MouseEventArgs e) { if (!IsOpened("frmCa")) { frmCa ca = new frmCa(); ca.MdiParent = this; ca.Name = "frmCa"; ca.Show(); } }
private void btCa_Click(object sender, EventArgs e) { frmCa frmca = new frmCa(); frmca.Show(); }