请问哪能找到串口支持大于16的ActiveX控件？

Question

打开串口时在串口名前加上'\\.\'
CreateFile( PChar('\\.\'+FCommName),
                  ______   
                                 GENERIC_READ or GENERIC_WRITE,
                                 0, {not shared}
                                 nil, {no security ??}
                                 OPEN_EXISTING,
                                 FILE_ATTRIBUTE_NORMAL or FILE_FLAG_OVERLAPPED,
                                 0 {template} );