Serial VS USB
in [Visual Basic]
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From: Bee on 30 Dec 2009 18:41 My VB6 app looks at ports using the MSCOMM (MSCOMM32 ActiveX Control)component. I try to open a port and set parameters. Unfortunately, I do not know how to distinguish a serial port from a USB port. What test can I use to determine if the port is USB or Serial?
From: Jim Mack on 30 Dec 2009 21:18 Bee wrote: > My VB6 app looks at ports using the MSCOMM (MSCOMM32 ActiveX > Control)component. I try to open a port and set parameters. > Unfortunately, I do not know how to distinguish a serial port from > a USB port. What test can I use to determine if the port is USB or > Serial? If you can open it with MSCOMM, it's a serial port. It doesn't matter if it's a physical port, a virtual port, or a USB-hosted port. -- Jim Mack Twisted tees at http://www.cafepress.com/2050inc "We sew confusion"
From: CY on 31 Dec 2009 07:01 On 31 Dec, 00:41, Bee <B...(a)discussions.microsoft.com> wrote: > My VB6 app looks at ports using the MSCOMM (MSCOMM32 ActiveX Control)component. > I try to open a port and set parameters. > Unfortunately, I do not know how to distinguish a serial port from a USB port. > What test can I use to determine if the port is USB or Serial? Unfortnatly I don have any serial or serial USB devices but Number of serial devices might be found at HKEY_LOCAL_MACHINE\SYSTEM \CurrentControlSet\Services\Serial\Enum\Count Do they differ in any way? I use them alike from VB with no problems so far... //CY
From: Bee on 31 Dec 2009 11:57 I need to know if a port is Serial (RS232) or USB or whatever not just a count although a count is useful. THere used to be two serial RS-232 ports on a PC. I need to see if my app will work on the PC or if I need to suggest a USB Serial converter. There may not be any device hooked up so I cannot rely on trying to communicate e.g. see if it respons as a modem (which I already do). There are hardware interfaces that are only serial RS232 that I need to talk to. To me serial has always meant RS-232 as that is the technology I grew up with. Also, does anyone recommend a good USB to Serial RS232 converter? "Bee" wrote: > My VB6 app looks at ports using the MSCOMM (MSCOMM32 ActiveX Control)component. > I try to open a port and set parameters. > Unfortunately, I do not know how to distinguish a serial port from a USB port. > What test can I use to determine if the port is USB or Serial? >
From: Nobody on 31 Dec 2009 12:25
"Bee" <Bee(a)discussions.microsoft.com> wrote in message news:E0C57B85-8A3E-4889-B989-2F5860FCA234(a)microsoft.com... >I need to know if a port is Serial (RS232) or USB or whatever not just a > count although a count is useful. Why do you need to know that? I can't think of any reason to limit a software from using USB-to-Serial converters. For you, they behave the same. |