SComm32.ocx is a replacements for Microsoft's MSComm32.OCX It has the same property names, methods and syntax as MSComm32 which means that, in most cases, it takes just a minute or two to add SComm32 to a VB6 project in place of MSComm32 without needing to change any of your code or learn any new syntax. 255 Com ports in VB6 on 32bit AND 64bit versions of Windows ? Maybe you just want more com ports? As you know, Microsoft's MSComm32 is limited to 16 ports. SComm32 doesn't have that limitation. Developers often say that they can't get MScomm32 working in the visual studio IDE on 64 bit versions of windows. Or that MScomm32 fails to register when deploying to users of 64 bit windows. Try before you buy - Download your free trial of SComm32 Communications OCX. The download also includes fully functional sample applications with VB source code.