[RESOLVED] [2008] User input data from textbox into an array

I'm trying to make a program where user can input data from a textbox into an array and when the user hit the enter key, it compare it to a data grab from a text file. Here is my code so far:

Private Sub TextBox_KeyDown(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox.TextChanged
Dim input As String
Dim KeyCode As Integer

input = CStr(TextBox.Text)
If KeyCode = 13 Then
If InStr(1, varia3, input, vbTextCompare) <> 0 Then golden = True
If golden = True Then msgbox("match")
If golden = False Then msgbox("mismatch")
End If
End Sub

I got the part where the program can graph data from text file and put it into an array called "varia3". The part I could not get is allowing user to enter data into the textbox. When I run the program, the sec I try to enter a letter or number into the textbox the program ended.

Use the KeyDown event;

Code:

---

    Private Sub TextBox1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) _
    Handles TextBox1.KeyDown
        If e.KeyCode = Keys.Enter Then
            If varia3 = TextBox1.Text Then
                MsgBox("match")
            Else
                MsgBox("mismatch")
            End If
        End If
    End Sub

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This code seems a lot better, but it still won't allow user to enter data. When I ran the program, the sec I enter a letter or numbers the program ended.