| Using the C1Query Control to Generate SQL > Including/Excluding Query Items in the Resulting SQL |
By setting Checkboxes property to True, you will allow the end user to control which query items are included in the resulting SQL statement. In this case, every query item contains a checkbox. Checking it includes the item in SQL, unchecking it excludes the item.
Including/excluding items can also be done programmatically, using the Checked property and Checked (ItemID) property. The two properties have the same effect.
You can use the item's Checked property programmatically even if Checkboxes=False. The item will be included/excluded in SQL although there won't be visual indication in the form of a checkbox.