Add Combo Box Item To List Box

I use ComboBox to add items to the ListBox in userform

I am tring to loop through the ListBox to check each name in the ListBox, so ifthe name chosen by the ComboBox exists in the ListBox then donot add it,
but both codes do check the number of the item in the ListBox.

I need to check the name of the item?


With ListBox1
For i = 1 To ListBox1.Value
If i = ComboBox1.Value Then MsgBox "u cannot add this item"
Exit Sub
Next i

For i = LBound(ListBox1.List) To UBound(ListBox1.List)
If i = ComboBox1.Value Then MsgBox " u cannot add this item"
Exit Sub
Next i

.AddItem tot.Value
.List(.ListCount - 1, 1) = ComboBox1.Value
End With