private void set_define_events()
{
this.Load += new System.EventHandler(this.F115_dm_thu_tu_don_vi_de_Load);
m_cmd_save.Click += m_cmd_save_Click;
m_cmd_exit.Click += m_cmd_exit_Click;
this.KeyDown += F115_dm_thu_tu_don_vi_de_KeyDown;
m_txt_stt.KeyPress += M_txt_stt_KeyPress;
}