Bonsoir Charlie, Bonsoir Gambers, I would like to be more understandable but my english is very poor ! I have a screen with a checkbox which return a Gambas boolean value (true or false )OK ? My problem is how to write this value in an MySQL field ? This example: My_data = '" & my_checkbox.value & "' don't work ! Thank you for your help. °~Jacky~°