public void addUser(
String strChannel, String strUserName, String strConnectDate, String strHost) {
if (strChannel.equals(mstrChannel)) return;
removeUser(strChannel);
Vector vtData = new Vector();
vtData.addElement(strChannel);
vtData.addElement(strUserName);
vtData.addElement(strConnectDate);
vtData.addElement(strHost);
tblUser.addRow(vtData);
}