what does ClassGuid = {00000000-0000-0000-0000-000000000000} mean?

[Version]
signature = "$Windows NT$"
Provider = %Company%
ClassGuid = {00000000-0000-0000-0000-000000000000}
DriverVer = 07/07/2008,1.0.0.1
CatalogFile = mydriver.cat

If I have a classguid like the above,what does it mean.Is class and
classguid entry in inf file mandatory.
I was able to install the driver without the class entry in my inf file as
mentioned above.
but chkinf gives error if it doesnt find class and classguid entry in the
inf file.
may be my question is stupid but I couldnt resist asking.
Thanks in advance

Alexander
Wed Jul 09 09:48:47 CDT 2008

Use UUIDGEN or GUIDGEN to generate your own guid. Null guid is just a
placeholder. You also need class name.

"qwert" <qwert@discussions.microsoft.com> wrote in message
news:D883BF90-4A4D-4512-9F2F-99708F5116D3@microsoft.com...
> [Version]
> signature = "$Windows NT$"
> Provider = %Company%
> ClassGuid = {00000000-0000-0000-0000-000000000000}
> DriverVer = 07/07/2008,1.0.0.1
> CatalogFile = mydriver.cat
>
> If I have a classguid like the above,what does it mean.Is class and
> classguid entry in inf file mandatory.
> I was able to install the driver without the class entry in my inf file as
> mentioned above.
> but chkinf gives error if it doesnt find class and classguid entry in the
> inf file.
> may be my question is stupid but I couldnt resist asking.
> Thanks in advance

qwert
Tue Jul 15 05:13:03 CDT 2008

I used GUIDGEN to generate the GUID.
But I dont have class name anyways.
Is class name mandatory.But my driver gets installed successfully
chkinf gives error as I dont have class name

Thanks in advance

"Alexander Grigoriev" wrote:

> Use UUIDGEN or GUIDGEN to generate your own guid. Null guid is just a
> placeholder. You also need class name.
>
> "qwert" <qwert@discussions.microsoft.com> wrote in message
> news:D883BF90-4A4D-4512-9F2F-99708F5116D3@microsoft.com...
> > [Version]
> > signature = "$Windows NT$"
> > Provider = %Company%
> > ClassGuid = {00000000-0000-0000-0000-000000000000}
> > DriverVer = 07/07/2008,1.0.0.1
> > CatalogFile = mydriver.cat
> >
> > If I have a classguid like the above,what does it mean.Is class and
> > classguid entry in inf file mandatory.
> > I was able to install the driver without the class entry in my inf file as
> > mentioned above.
> > but chkinf gives error if it doesnt find class and classguid entry in the
> > inf file.
> > may be my question is stupid but I couldnt resist asking.
> > Thanks in advance
>
>
>

GottfriedStckl
Tue Jul 22 15:44:01 CDT 2008

If you do not provide a ClassGuid and a classname, then you will not be able
to connect to the deviceinterface.
Even though the driver will install, it is worthless, because usually you
want to communicate with your driver with an application.
This will not be possible if you have no deviceinterface.

"qwert" wrote:

> I used GUIDGEN to generate the GUID.
> But I dont have class name anyways.
> Is class name mandatory.But my driver gets installed successfully
> chkinf gives error as I dont have class name
>
> Thanks in advance
>
> "Alexander Grigoriev" wrote:
>
> > Use UUIDGEN or GUIDGEN to generate your own guid. Null guid is just a
> > placeholder. You also need class name.
> >
> > "qwert" <qwert@discussions.microsoft.com> wrote in message
> > news:D883BF90-4A4D-4512-9F2F-99708F5116D3@microsoft.com...
> > > [Version]
> > > signature = "$Windows NT$"
> > > Provider = %Company%
> > > ClassGuid = {00000000-0000-0000-0000-000000000000}
> > > DriverVer = 07/07/2008,1.0.0.1
> > > CatalogFile = mydriver.cat
> > >
> > > If I have a classguid like the above,what does it mean.Is class and
> > > classguid entry in inf file mandatory.
> > > I was able to install the driver without the class entry in my inf file as
> > > mentioned above.
> > > but chkinf gives error if it doesnt find class and classguid entry in the
> > > inf file.
> > > may be my question is stupid but I couldnt resist asking.
> > > Thanks in advance
> >
> >
> >