File Browser:
To include a clear button add _C to the end of the name.

Check Box:
Data should be either true or false to indicate the default state of the check box.

Radio Buttons and Select Menu:
Data should have one entry per line for each radio button or menu item. The default selected item is indicated by enclosing the name in brackets.
item1_name=item1_value
[item2_name]=item2_value
item3_name=item3_value