Purpose
The RemoveItem function removes an item from collection controls such as AutoCompleteTextBox, CheckBoxGroup, ComboBox, ListBox, Multi ListBox, and RadioButtonGroup.
Syntax
RemoveItem(Control name,value)
Arguments
ControlName – Control from the items to be removed
Value – Items to be removed

Example:
RemoveItem(ComboBox1, “Green”)
The function will remove the item “Green” from ComboBox1, if it exists.