If textarea.background is black and you set text (foreground) to white, the cursor (blinking | ) is still invisible
Is there how to see the cursor (change its color?) in a black textarea ?

 No

TextArea is a pure toolkit control so those kind of settings are limited.

Maybe Benoit would consider this a bug and find a way to make cursor blink foreground colour.

Or use a more Gambas made control like text editor or if it's black for command output maybe try a terminal view and just run commands in the terminal.

sergioabreu said

….the cursor (blinking | ) is still invisible

This happens using GTK.
When activating a Component, based on QT, the cursor turns white.

Tks for all