i have 1 text box and combobox. all i want is to enter all data that is type or selected in combobox is showed in list view. can you help me to do that.? and all entered data in listview could be save in database. ^^

Try something like this:

Dim lviNew As New ListViewItem

With lviNew
    ' I always assign my unique values to the .Text property.
    ' This will make it easier to compare against a database.
    .Text = TextBox1.Text
End With