"When textbox, you can use CSS to change for example background image, text style, image, all that."
How do I change CSS to an object?
You can check all css properties here: w3schools.com/cssref
Anyways, add a textinput to your project.
Then open the event sheet, do on start of layout > textinput set css
(you can also change attributes here)
Anyways, then set a property to whatever you want, so for transparent bg here is an example:
This will make the textbox transparent, check the list from W3Schools, you can change a lot:) Good luck.