private void toolStripMenuItem52_Click(object sender, EventArgs e)
 {
     if (m_XepLoaiHanhKiemHS == null || m_XepLoaiHanhKiemHS.IsDisposed)
     {
         m_XepLoaiHanhKiemHS = new frmXepLoaiHS();
         m_XepLoaiHanhKiemHS.MdiParent = frmMain.ActiveForm;
         m_XepLoaiHanhKiemHS.Show();
     }
     else m_XepLoaiHanhKiemHS.Activate();
 }
 private void mnXepLoaiHS_Click(object sender, EventArgs e)
 {
     if (m_XepLoaiHS == null || m_XepLoaiHS.IsDisposed)
     {
         m_XepLoaiHS = new frmXepLoaiHS();
         m_XepLoaiHS.MdiParent = frmMain.ActiveForm;
         m_XepLoaiHS.Show();
     }
     else m_XepLoaiHS.Activate();
 }