private void toolNhapSach_Click(object sender, EventArgs e)
{
frmNhapSach fNhapSach = new frmNhapSach();
foreach (Form frm in this.MdiChildren)
{
frm.Close();
}
fNhapSach.MdiParent = this;
fNhapSach.Show();
}
private void nhậpSáchToolStripMenuItem_Click(object sender, EventArgs e)
{
frmNhapSach frmNhapSach = new frmNhapSach();
foreach (Form frm in this.MdiChildren)
{
frm.Close();
}
frmNhapSach.MdiParent = this;
frmNhapSach.Show();
}