Forms :: Add Record To Table From A Form Using Unbound List And Text Boxes?

I have a form with 1 unbound listbox as drop down list (entypolst), an unbound text box(entypotxt) and a command button. The list box reads items from a table. I want to change a value (text) on listbox, input a text on textbox so pressing the button add a new record in a table (Table1 fields Category,Product) showing in my form as subform (SFTable1) in datasheet view. For that reason a made the following code:

Code:
Private Sub AddBtn_Click()
Dim ans As Integer
Dim strSQL As String
Dim db As DAO.Database
Dim rs As DAO.Recordset
Dim ctl As Control

[code]....

I take the error msg for 0 items selected in listbox and exit the sub.