Is there a way to define individual Enabled states for different items in a ComboBox?

Illustrative Example (not valid code):
Code:
ComboBox.Item.Add("Car")
ComboBox.Item.Add("Truck")
ComboBox.Item.Add("Bike")

ComboBox.Item(0).Enabled=True
ComboBox.Item(1).Enabled=False
ComboBox.Item(2).Enabled=True
Effect:
All three items are shown, but only items 0 and 2 can be selected

(No work-around like removing items that are not enabled. All items have to be shown!)

Thanks