private void toolStripButton3_Click(object sender, EventArgs e)
{
frmMuonTra ds = new frmMuonTra(this.id);
ds.MdiParent = this;
ds.Show();
}
private void danhMụcĐọcGiảToolStripMenuItem_Click(object sender, EventArgs e)
{
frmMuonTra ds = new frmMuonTra(this.id);
ds.MdiParent = this;
ds.Show();
}
private void btnMuonTra_Click(object sender, EventArgs e)
{
frmMuonTra frmmt = new frmMuonTra();
this.Hide();
frmmt.ShowDialog();
this.Show();
}
