Off-topic: Understanding win32k system calls - help please

[Jeetu Golani]

Hi,

First, I'd like to apologize since what I'm asking doesn't directly relate to
 ReactOS however I'm hoping someone here might be able to shed some light.

I've built a rudimentary win32k profiler and  I've hooked the win32k SDT and
 hooked onto the NtUserCreateWindowEx function in the hope of studying values
 returned by it. I see some strange (to me) values for the x and y
 coordinates - values such as 1547372 etc. I'm not sure how to interpret these
 values and convert them into pixel units or traditional coordinate
 mechanisms. I first thought there must be something wrong with my code
 however I'm not so sure anymore.

Would someone here be able to guide me on how to interpret these values???

Thanks and sorry again

Bye for now

[James Tabor]

Hi,
ReactOS as a guide, our NtUserCreateWindowEx maybe wrong and
misaligned. Each version of windows has one thing or another changed
with the win32k API. It could be a PUNICODE_STRING or LPWSTR. You will
have to take what we know from the past to decode the new.
James

On Wed, Sep 24, 2008 at 2:18 PM, Jeetu Golani [e-mail] wrote:
> Hi,
>
> First, I'd like to apologize since what I'm asking doesn't directly relate to
>  ReactOS however I'm hoping someone here might be able to shed some light.
>
> I've built a rudimentary win32k profiler and  I've hooked the win32k SDT and
>  hooked onto the NtUserCreateWindowEx function in the hope of studying values
>  returned by it. I see some strange (to me) values for the x and y
>  coordinates - values such as 1547372 etc. I'm not sure how to interpret these
>  values and convert them into pixel units or traditional coordinate
>  mechanisms. I first thought there must be something wrong with my code
>  however I'm not so sure anymore.
>
> Would someone here be able to guide me on how to interpret these values???
>
> Thanks and sorry again
>
> Bye for now
>
> Ros-dev mailing list
> [e-mail]
> http://www.reactos.org/mailman/listinfo/ros-dev

[Alex Ionescu]

Hi,

It's well known that sometimes Windows will create Windows with  
negative coordinates (maybe you're treating them as unsigned). This is  
how I believe "minimize" works or some other strange GUI behavior  
that's been there since Win 3.1... rchen blogged about it some couple  
years ago.

On 24-Sep-08, at 3:18 PM, Jeetu Golani wrote:
> Hi,
>
> First, I'd like to apologize since what I'm asking doesn't directly  
> relate to
> ReactOS however I'm hoping someone here might be able to shed some  
> light.
>
> I've built a rudimentary win32k profiler and  I've hooked the win32k  
> SDT and
> hooked onto the NtUserCreateWindowEx function in the hope of  
> studying values
> returned by it. I see some strange (to me) values for the x and y
> coordinates - values such as 1547372 etc. I'm not sure how to  
> interpret these
> values and convert them into pixel units or traditional coordinate
> mechanisms. I first thought there must be something wrong with my code
> however I'm not so sure anymore.
>
> Would someone here be able to guide me on how to interpret these  
> values???
>
> Thanks and sorry again
>
> Bye for now
>
> Ros-dev mailing list
> [e-mail]
> http://www.reactos.org/mailman/listinfo/ros-dev

Best regards,
Alex Ionescu

[Jeetu Golani]

Thanks everyone for replying :)
> It's well known that sometimes Windows will create Windows with
> negative coordinates (maybe you're treating them as unsigned). This is
> how I believe "minimize" works or some other strange GUI behavior
> that's been there since Win 3.1... rchen blogged about it some couple
> years ago.

I would appreciate it if you could point me towards that blog.....any links or 
anything i can search for that u remember...maybe it will give me some 
clue :)...thanks

On Thursday 25 Sep 2008, you wrote:
> Hi,
>
> It's well known that sometimes Windows will create Windows with
> negative coordinates (maybe you're treating them as unsigned). This is
> how I believe "minimize" works or some other strange GUI behavior
> that's been there since Win 3.1... rchen blogged about it some couple
> years ago.
>
> On 24-Sep-08, at 3:18 PM, Jeetu Golani wrote:
> > Hi,
> >
> > First, I'd like to apologize since what I'm asking doesn't directly
> > relate to
> > ReactOS however I'm hoping someone here might be able to shed some
> > light.
> >
> > I've built a rudimentary win32k profiler and  I've hooked the win32k
> > SDT and
> > hooked onto the NtUserCreateWindowEx function in the hope of
> > studying values
> > returned by it. I see some strange (to me) values for the x and y
> > coordinates - values such as 1547372 etc. I'm not sure how to
> > interpret these
> > values and convert them into pixel units or traditional coordinate
> > mechanisms. I first thought there must be something wrong with my code
> > however I'm not so sure anymore.
> >
> > Would someone here be able to guide me on how to interpret these
> > values???
> >
> > Thanks and sorry again
> >
> > Bye for now
> >
> > Ros-dev mailing list
> > [e-mail]
> > http://www.reactos.org/mailman/listinfo/ros-dev
>
> Best regards,
> Alex Ionescu