[Gambas-user] Button Transparency

[KKing]

hButton.Background = Color.Transparent
Works great on a debian 10 KDE unit out of box.
But on debian 9 LXDE (fairly plain) unit the button is black not 
transparent.
I've installed "compton" on a Debian 9 LXDE unit and now have a "Window 
Effects" menu item with a plethora of options of which I have no idea 
what they all mean. But know it can do stuff as funky command in terminal of
compton --opacity-rule 45:'class_g *= "X-terminal-emulator"'
makes all the other windows faint, until the command is terminated.
Anyone know what setting(s) I need to look at to make the button 
transparent in LXDE?
K.