public ComboBoxEx()
{
//Load the textbox and comboBox and add them to this control
tb.Show();
this.Controls.Add(tb);
cb.Show();
this.Controls.Add(cb);
tb.BringToFront();
//tb.Multiline = true; // we need this to set the size properly
//tb.WordWrap = false;
cb.SelectedValueChanged += new EventHandler(cb_SelectedValueChanged);
cb.SelectedIndexChanged += new EventHandler(cb_SelectedIndexChanged);
tb.LostFocus += new EventHandler(tb_TextChanged);
tb.KeyUp += new System.Windows.Forms.KeyEventHandler(ComboBox_KeyUp);
}