private void btnTTPM_Click(object sender, EventArgs e)
{
if (lnd == null || lnd.IsDisposed)
{
lnd = new frmLoaiNguoiDung();
lnd.MdiParent = frmMain.ActiveForm;
lnd.Show();
}
else lnd.Activate();
}
private void btnLoaiNguoiDung_Click(object sender, EventArgs e)
{
if (m_LoaiNguoiDung == null || m_LoaiNguoiDung.IsDisposed)
{
m_LoaiNguoiDung = new frmLoaiNguoiDung();
m_LoaiNguoiDung.MdiParent = frmMain.ActiveForm;
m_LoaiNguoiDung.Show();
}
else m_LoaiNguoiDung.Activate();
}