Alaska Software Inc. - Detect availeble serial port above COM10

	Author	Topic: Detect availeble serial port above COM10 - Comtest.prg
	Jack Duijf	Detect availeble serial port above COM10 - Comtest.prg on Thu, 28 May 2020 18:16:08 +0200 Hello, In windows 10, i try to detect the availeble serial COM devices. This works fine for COM1 to COM9. However, if a COM10 port is installed, i seem to be unable to detect this if the port is in use. Try this test program as attache to this message, if a COM device is visible in the system properties. Who can help me detecting a COM device above COM9, even if it is in use? Regards Jack Duijf ------------------------------------------------------------- Also a member off the XXP (http://www.xxp.nl) Comtest.prg
	Frans Vermeulen	Re: Detect availeble serial port above COM10 - Comtest.prg on Fri, 05 Jun 2020 14:23:16 +0200 Hi Jack, I found PDR 5793. Solution: IF nPort > 9 cDevice := "\\.\COM" + STR( nPort,2) ELSE cDevice := "COM" + STR( nPort,1) ENDIF I suspect, your problem is related. Regards, Frans Vermeulen > Hello, > > In windows 10, i try to detect the availeble serial COM devices. > This works fine for COM1 to COM9. > However, if a COM10 port is installed, i seem to be unable to detect this if the port is in use. > > Try this test program as attache to this message, if a COM device is visible in the system properties. > > Who can help me detecting a COM device above COM9, even if it is in use? > Regards > Jack Duijf > > ------------------------------------------------------------- > Also a member off the XXP (http://www.xxp.nl) Frans Vermeulen <fv@gbor.nl>
	Frans Vermeulen	Re: Detect availeble serial port above COM10 - Comtest.prg on Fri, 05 Jun 2020 15:13:35 +0200 To add to that: here is the m$ doc that describes it. https://docs.microsoft.com/nl-nl/windows/win32/fileio/naming-a-file#win32-file-namespaces Regards, Frans Vermeulen > Hi Jack, > > I found PDR 5793. > > Solution: > > IF nPort > 9 > cDevice := "\\.\COM" + STR( nPort,2) > ELSE > cDevice := "COM" + STR( nPort,1) > ENDIF > > I suspect, your problem is related. > > Regards, > Frans Vermeulen > > > > Hello, > > > > In windows 10, i try to detect the availeble serial COM devices. > > This works fine for COM1 to COM9. > > However, if a COM10 port is installed, i seem to be unable to detect this if the port is in use. > > > > Try this test program as attache to this message, if a COM device is visible in the system properties. > > > > Who can help me detecting a COM device above COM9, even if it is in use? > > Regards > > Jack Duijf > > > > ------------------------------------------------------------- > > Also a member off the XXP (http://www.xxp.nl) > > > -- > Frans Vermeulen <fv@gbor.nl> Frans Vermeulen <fv@gbor.nl>

Author

Topic: Detect availeble serial port above COM10 - Comtest.prg

Detect availeble serial port above COM10 - Comtest.prg
on Thu, 28 May 2020 18:16:08 +0200

Hello,

In windows 10, i try to detect the availeble serial COM devices.
This works fine for COM1 to COM9.
However, if a COM10 port is installed, i seem to be unable to detect this if the port is in use.

Try this test program as attache to this message, if a COM device is visible in the system properties.

Who can help me detecting a COM device above COM9, even if it is in use?
Regards
Jack Duijf

-------------------------------------------------------------
Also a member off the XXP (http://www.xxp.nl)

Comtest.prg

Frans Vermeulen

Re: Detect availeble serial port above COM10 - Comtest.prg
on Fri, 05 Jun 2020 14:23:16 +0200

Hi Jack,

I found PDR 5793.

Solution:

IF nPort > 9
  cDevice := "\\.\COM" + STR( nPort,2)
ELSE
  cDevice := "COM" + STR( nPort,1)
ENDIF

I suspect, your problem is related.

Regards,
Frans Vermeulen


> Hello,
> 
> In windows 10, i try to detect the availeble serial COM devices.
> This works fine for COM1 to COM9.
> However, if a COM10 port is installed, i seem to be unable to detect this if the port is in use.
> 
> Try this test program as attache to this message, if a COM device is visible in the system properties.
> 
> Who can help me detecting a COM device above COM9, even if it is in use?
> Regards
> Jack Duijf
> 
> -------------------------------------------------------------
> Also a member off the XXP (http://www.xxp.nl)

Frans Vermeulen <fv@gbor.nl>

Frans Vermeulen

Re: Detect availeble serial port above COM10 - Comtest.prg
on Fri, 05 Jun 2020 15:13:35 +0200

To add to that: here is the m$ doc that describes it.
https://docs.microsoft.com/nl-nl/windows/win32/fileio/naming-a-file#win32-file-namespaces

Regards,
Frans Vermeulen

> Hi Jack,
> 
> I found PDR 5793.
> 
> Solution:
> 
> IF nPort > 9
>   cDevice := "\\.\COM" + STR( nPort,2)
> ELSE
>   cDevice := "COM" + STR( nPort,1)
> ENDIF
> 
> I suspect, your problem is related.
> 
> Regards,
> Frans Vermeulen
> 
> 
> > Hello,
> > 
> > In windows 10, i try to detect the availeble serial COM devices.
> > This works fine for COM1 to COM9.
> > However, if a COM10 port is installed, i seem to be unable to detect this if the port is in use.
> > 
> > Try this test program as attache to this message, if a COM device is visible in the system properties.
> > 
> > Who can help me detecting a COM device above COM9, even if it is in use?
> > Regards
> > Jack Duijf
> > 
> > -------------------------------------------------------------
> > Also a member off the XXP (http://www.xxp.nl)
> 
> 
> -- 
> Frans Vermeulen <fv@gbor.nl>

Frans Vermeulen <fv@gbor.nl>