... Bluetooth Stack if I try: IF BuildCommDcb( "COM"+alltrim(str(nComPort))+":9600,N,8,1", @cDcb ) Endif It returns .f. On the Toshiba Bluetooth Stack it returns .t. Here is the strange part.... If I remove the "IF" and just try "BuildCommDcb( "COM"+alltrim(str(nComPort))+":9600,N,8,1", ...