How to Uncheck All Items in a Checked Listbox in VB.net?
CheckedListBox Control in VB.NET
CheckedListBox Control in VB.NET is a listbox with a checkbox to the left of each item. This control is dervied
from checked list box control, so the functions of the ListBox class can be used with this control.
Using the Items property of the CheckedListBox Control, list of items are added.
On the Click event of the button, the SetItemChecked method is used to uncheck the first item.
The argument passed to this method are0 for the first item, False to uncheck the item.