LXDE Collegamento apps

The essential elements of these files appear to be:-

[Desktop Entry]
Encoding=UTF-8
Type=Application
Name={name of application}
Exec={command line}
Comment={a mouse-over type tooltip}
Categories={a category name}

...and here is a simplified example;

[Desktop Entry]
Encoding=UTF-8
Type=Application
Name=Calculator
Exec=galculator
Comment=Its a calculator
Categories=Utility;