我编写了这样一个程序，为什么数组的值在输入后仍然为零？请教一下高手！

Dim ND(20), T(20) As Double

Private Sub Text1_KeyPress(KeyAscii As Integer)
If KeyAscii = 13 Then
Label3.Caption = Label3.Caption + vbLf + Text1.Text
Text1.Text = ""
i = i + 1
ND(i) = Val(Text1.Text)
End If
End Sub

Private Sub Text2_KeyPress(KeyAscii As Integer)
If KeyAscii = 13 Then
Label4.Caption = Label4.Caption + vbLf + Text2.Text
Text2.Text = ""
j = j + 1
ND(j) = Text2.Text
End If

End Sub