relative database file URL so that the project could be in any location
fix issues: main program wouldn't exit after clicking exit in login form or top right X button
use Modal dialog to show popup window so that we don't need to Enable/UnEnable main frame
line search sets search option by default
search by line name or station name initial implementation
five buttons in Search frame. excel export, print and back button are implemented. For add and update, please create a new frame by yourself taking my previous one as reference.
fix wrong status