To change the symbology type, set the appropriate number for the SymbologyID property: CODE39=0; CODE39EXT=1; INTERLEAVED25=2; CODE11=3; CODABAR=4; MSI=5; UPCA=6; IND25=7; MAT25=8; CODE93=9; EAN13=10; EAN8=11; UPCE=12; CODE128=13; CODE93EXT=14; POSTNET=15; PLANET=16; UCC128=17; the default is CODE128.