It was easy to generate a 3 of 9 barcode using Font()
Font()
Font f = new Font(\"Free 3 of 9\", 80); this.Font = f; Label l = new Label(); l.Text = \"*STA
Looking at Wikipedia page for Barcode128, I think you should use ASCII codes 208-210 to delimit a block, according to Bar Code Widths paragraph and table.