>How can I add 2 items into a listbox with 2 columns, 1 in each column?

Try this,

    myList.RowSourceType = 0         && None
    myList.ColumnCount = 2           && 2 Columns

    myList.AddListItem("A1",1,1)     && Row 1 Col 1
    myList.AddListItem("A2",1,2)     && Row 1 Col 2
    myList.AddListItem("B1",2,1)     && Row 2 Col 1
    myList.AddListItem("B2",2,2)     && Row 2 Col 2