Make ListView FindItemWithText Match Entire Text

I have a ListView with two columns, and before enter a new item in the listview, I want to prevent entering a duplicate value, so I found ListView.FindItemWithText to accomplish that.

But I realized that if I enter 232323, and then enter 2323, which is different but starts with the same digits as the first entry, the function returns that item as a match.

I wonder if there is any way to match the whole text (exact text) to avoid the above.

Here is my code:

Dim ChkSIM As New ListViewItem
ChkSIM = lvItems.FindItemWithText("2323")
If Not ChkSIM Is Nothing Then
lblErrorSIM.Text = "Already in list"
End If