number of check boxes depending on number of columns

How can I add check boxes, depending on the number of columns that a table has?.

I have a ComboBox where I can choose one table from my data base, and the program will make a select depending on what check box you checked. I know how to change the check box label and set it the column names on the table selected by the comboBox. But how can I add or delete new CheckBox, having the same number of checkboxes as the number of columns?