Late Binging Error

I am sort of neww to the programming world. I am taking a VB.NET class and have a late binding error in my code. Could someone please help me find it.

Here is my code:

VB Code:

Private Sub addButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles addButton.Click
        ' Adds a new movie categroy to the category list.
 
        With movieCategoryComboBox
            ' Test for blank input.
            If .Text <> "" Then
                ' Make sure the item is not already selected.
                Dim itemFoundBoolean As Boolean
                Dim itemIndexInteger As Integer
                Do Until itemFoundBoolean Or itemIndexInteger = movieCategoryComboBox.Items.Count
                    If .Text = [U].Items(itemIndexInteger).ToSting()[/U] Then
                        itemFoundBoolean = True
                    End If
                    itemIndexInteger += 1
                Loop
                If itemFoundBoolean Then
                    MessageBox.Show("Duplicate Item", "Add Failed")
                Else
                    ' If it's not in the list then add it.
                    .Items.Add(.Text)
                    .Text = ""
                End If
            Else
                MessageBox.Show("Enter a Movie Category To Add", "Missing Data", _
                    MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
            End If
            .Focus()
        End With
    End Sub

I have underlined were the error is.

"ToSting" ??? How about "ToString" ???

Do you have Option Explict or Option Strict turned on? If not, you should consider it.

I found the error right after I posted the thread. I don't know why I didn't catch it before. My daughter & I have both been sick so it might have been the nightquil...

Thank You