To be released Soon.
From version 0.9 the netsender window can be minimized into the tray icon and on startup also it will start minimized.
The net sender window can be maximized or minimized by just clicking on the tray icon.
If the window is minimized into the tray then the recieved msg is shown as a net send popup.
The popup can be closed by pressing Esc key and The netsender window can also be minimized by pressing Esc Key.