The Show Header Checkbox property allows you to select an entire list of information instead of having to check each individual row or column. Follow these steps to apply a Header Checkbox to your list:
- Start with the project you completed at the end of the Quick Start Step 2.
- Select the C1List control on your form to open the Properties window. Change the SelectionMode property from One to Checkbox.
- Change the ShowHeaderCheckBox property to True.
Your form should look similar to the following image:

- Press the F5 key to run your application. Note that the C1List now has a checkbox appearing in the header that allows you to select the entire list.