Hello
well normally while rotating a screen a black flicker appears on the screen.
When trying to rotate screen with changedisplaysettings api the screen gets
rotated but a flicker is there so can anybody tell me some way to remove that
black flicker?

Short of creating a new line of graphics chipsets, no probably nothing you
can do.

--
Josh Einstein (Tablet PC MVP)
Einstein Technologies
Tablet Enhancements for Outlook - Try it free: www.tabletoutlook.com


"Ravi" <Ravi@discussions.microsoft.com> wrote in message
news:8B150DB6-5A82-43B5-911B-32E9C22E6249@microsoft.com...
> Hello
> well normally while rotating a screen a black flicker appears on the
> screen.
> When trying to rotate screen with changedisplaysettings api the screen
> gets
> rotated but a flicker is there so can anybody tell me some way to remove
> that
> black flicker?

I am sorry but ,surely there is some way out to remove that flicker.
As there are lots of devices available in the market which have got this
feature of rotating screen either manually or automatically.

Thanks for you'r Reply but in case u have some suggetions please post it

Thanks
Ravi
--
hello


"Josh Einstein" wrote:

> Short of creating a new line of graphics chipsets, no probably nothing you
> can do.
>
> --
> Josh Einstein (Tablet PC MVP)
> Einstein Technologies
> Tablet Enhancements for Outlook - Try it free: www.tabletoutlook.com
>
>
> "Ravi" <Ravi@discussions.microsoft.com> wrote in message
> news:8B150DB6-5A82-43B5-911B-32E9C22E6249@microsoft.com...
> > Hello
> > well normally while rotating a screen a black flicker appears on the
> > screen.
> > When trying to rotate screen with changedisplaysettings api the screen
> > gets
> > rotated but a flicker is there so can anybody tell me some way to remove
> > that
> > black flicker?
>

If you're looking for some kind of registry setting then you're not going to
find it. If nothing else, you'd have to create a graphics driver which you
can't do (legitimately) since you don't make graphics hardware. But even
then, if it's a behavior of the video card then a driver won't help you
either. Changing screen orientation, with most modern hardware, is a
hardware operation. It's not simply software running on the CPU that's
rotating the pixels, otherwise that would be unbearably slow with as many
pixels as are packed into today's displays. Every device I have ever seen,
other than the iphone, blanks the screen briefly during a screen mode
change.

--
Josh Einstein (Tablet PC MVP)
Einstein Technologies
Tablet Enhancements for Outlook - Try it free: www.tabletoutlook.com


"Ravi" <Ravi@discussions.microsoft.com> wrote in message
news:3D7044C2-61ED-4C28-8E13-9719B73CAAFC@microsoft.com...
>I am sorry but ,surely there is some way out to remove that flicker.
> As there are lots of devices available in the market which have got this
> feature of rotating screen either manually or automatically.
>
> Thanks for you'r Reply but in case u have some suggetions please post it
>
> Thanks
> Ravi
> --
> hello
>
>
> "Josh Einstein" wrote:
>
>> Short of creating a new line of graphics chipsets, no probably nothing
>> you
>> can do.
>>
>> --
>> Josh Einstein (Tablet PC MVP)
>> Einstein Technologies
>> Tablet Enhancements for Outlook - Try it free: www.tabletoutlook.com
>>
>>
>> "Ravi" <Ravi@discussions.microsoft.com> wrote in message
>> news:8B150DB6-5A82-43B5-911B-32E9C22E6249@microsoft.com...
>> > Hello
>> > well normally while rotating a screen a black flicker appears on the
>> > screen.
>> > When trying to rotate screen with changedisplaysettings api the screen
>> > gets
>> > rotated but a flicker is there so can anybody tell me some way to
>> > remove
>> > that
>> > black flicker?
>>

Well I am talking about handheld devices equipped with windows embedded xp.I
am using API
int iRet=ChangeDisplaySettingsEx(NULL,&dm,NULL,0,NULL) ;

It works but with a flicker
then i tried
LONG iRet =
ChangeDisplaySettingsEx(dm.dmdevicename,&dm,NULL,C DS_VIDEOPARAMETERS,&test);

but it resulted -5 as an error(DISP_CHANGE_BADPARAM)

I am doing whole programming VS 2005 as embedded xp as an base operating
system.

Also
EnumDisplayDevices(dm.dmDeviceName,1,&device,0);
the window is popped up with message

Unhandled exception at 0x00000000 in SCREENROTATION.exe: 0xC0000005: Access
violation reading location 0x00000000.

So what should be device name.

please help me
--
hello


"Josh Einstein" wrote:

> If you're looking for some kind of registry setting then you're not going to
> find it. If nothing else, you'd have to create a graphics driver which you
> can't do (legitimately) since you don't make graphics hardware. But even
> then, if it's a behavior of the video card then a driver won't help you
> either. Changing screen orientation, with most modern hardware, is a
> hardware operation. It's not simply software running on the CPU that's
> rotating the pixels, otherwise that would be unbearably slow with as many
> pixels as are packed into today's displays. Every device I have ever seen,
> other than the iphone, blanks the screen briefly during a screen mode
> change.
>
> --
> Josh Einstein (Tablet PC MVP)
> Einstein Technologies
> Tablet Enhancements for Outlook - Try it free: www.tabletoutlook.com
>
>
> "Ravi" <Ravi@discussions.microsoft.com> wrote in message
> news:3D7044C2-61ED-4C28-8E13-9719B73CAAFC@microsoft.com...
> >I am sorry but ,surely there is some way out to remove that flicker.
> > As there are lots of devices available in the market which have got this
> > feature of rotating screen either manually or automatically.
> >
> > Thanks for you'r Reply but in case u have some suggetions please post it
> >
> > Thanks
> > Ravi
> > --
> > hello
> >
> >
> > "Josh Einstein" wrote:
> >
> >> Short of creating a new line of graphics chipsets, no probably nothing
> >> you
> >> can do.
> >>
> >> --
> >> Josh Einstein (Tablet PC MVP)
> >> Einstein Technologies
> >> Tablet Enhancements for Outlook - Try it free: www.tabletoutlook.com
> >>
> >>
> >> "Ravi" <Ravi@discussions.microsoft.com> wrote in message
> >> news:8B150DB6-5A82-43B5-911B-32E9C22E6249@microsoft.com...
> >> > Hello
> >> > well normally while rotating a screen a black flicker appears on the
> >> > screen.
> >> > When trying to rotate screen with changedisplaysettings api the screen
> >> > gets
> >> > rotated but a flicker is there so can anybody tell me some way to
> >> > remove
> >> > that
> >> > black flicker?
> >>
>

You are not going to be able to correct what you perceive as an issue. It
might be better to contact the manufacturer of your Tablet PC and talk with
their tech support people, or get in touch with the manufacturer of your
graphics card and complain to them.
--
Chris H.
Microsoft Windows MVP/Tablet PC
Tablet Creations - http://nicecreations.us/
http://forums.mobilepcworld.net
Associate Expert
Expert Zone - www.microsoft.com/windowsxp/expertzone

"Ravi" <Ravi@discussions.microsoft.com> wrote in message
news:78B6B6AC-1022-47BE-9E6F-94C8314329C7@microsoft.com...
> Well I am talking about handheld devices equipped with windows embedded
> xp.I
> am using API
> int iRet=ChangeDisplaySettingsEx(NULL,&dm,NULL,0,NULL) ;
>
> It works but with a flicker
> then i tried
> LONG iRet =
> ChangeDisplaySettingsEx(dm.dmdevicename,&dm,NULL,C DS_VIDEOPARAMETERS,&test);
>
> but it resulted -5 as an error(DISP_CHANGE_BADPARAM)
>
> I am doing whole programming VS 2005 as embedded xp as an base operating
> system.
>
> Also
> EnumDisplayDevices(dm.dmDeviceName,1,&device,0);
> the window is popped up with message
>
> Unhandled exception at 0x00000000 in SCREENROTATION.exe: 0xC0000005:
> Access
> violation reading location 0x00000000.
>
> So what should be device name.
>
> please help me
> --
> hello
>
>
> "Josh Einstein" wrote:
>
>> If you're looking for some kind of registry setting then you're not going
>> to
>> find it. If nothing else, you'd have to create a graphics driver which
>> you
>> can't do (legitimately) since you don't make graphics hardware. But even
>> then, if it's a behavior of the video card then a driver won't help you
>> either. Changing screen orientation, with most modern hardware, is a
>> hardware operation. It's not simply software running on the CPU that's
>> rotating the pixels, otherwise that would be unbearably slow with as many
>> pixels as are packed into today's displays. Every device I have ever
>> seen,
>> other than the iphone, blanks the screen briefly during a screen mode
>> change.
>>
>> --
>> Josh Einstein (Tablet PC MVP)
>> Einstein Technologies
>> Tablet Enhancements for Outlook - Try it free: www.tabletoutlook.com
>>
>>
>> "Ravi" <Ravi@discussions.microsoft.com> wrote in message
>> news:3D7044C2-61ED-4C28-8E13-9719B73CAAFC@microsoft.com...
>> >I am sorry but ,surely there is some way out to remove that flicker.
>> > As there are lots of devices available in the market which have got
>> > this
>> > feature of rotating screen either manually or automatically.
>> >
>> > Thanks for you'r Reply but in case u have some suggetions please post
>> > it
>> >
>> > Thanks
>> > Ravi
>> > --
>> > hello
>> >
>> >
>> > "Josh Einstein" wrote:
>> >
>> >> Short of creating a new line of graphics chipsets, no probably nothing
>> >> you
>> >> can do.
>> >>
>> >> --
>> >> Josh Einstein (Tablet PC MVP)
>> >> Einstein Technologies
>> >> Tablet Enhancements for Outlook - Try it free: www.tabletoutlook.com
>> >>
>> >>
>> >> "Ravi" <Ravi@discussions.microsoft.com> wrote in message
>> >> news:8B150DB6-5A82-43B5-911B-32E9C22E6249@microsoft.com...
>> >> > Hello
>> >> > well normally while rotating a screen a black flicker appears on the
>> >> > screen.
>> >> > When trying to rotate screen with changedisplaysettings api the
>> >> > screen
>> >> > gets
>> >> > rotated but a flicker is there so can anybody tell me some way to
>> >> > remove
>> >> > that
>> >> > black flicker?
>> >>
>>

I think the things can be done and that is for sure.

Ok Please tell me that
when we are making any changes in display settings there is a flicker or not
in windows embedded ce.

When we right click on DESKTOP then go to PROPERTIES then SETTINGS and
changing SCREEN RESOLUTION so then is there any flickering in windows
embedded ce or windows embedded xp.

i am using enumdisplaydevice to get device name
then enumdisplaysettings for getting display settings

VIDEOPARAMETERS test;
test.dwFlickerFilter = 1000;

then ChangeDisplaySettingsEx(device.DeviceName, &dm, NULL,
CDS_VIDEOPARAMETERS | CDS_UPDATEREGISTRY,&test);
to change display settings.
but the things are not working out.

All of the steps are taken in windows xp and coding is done in VS 2005

First, you're posting in the wrong newsgroup. This is a Tablet PC newsgroup,
not a developer newsgroup for Windows Embedded. Second, you've been given
two opinions that state you're S.O.L. Restating the request is not going to
get you a different opinion.

--
Josh Einstein (Tablet PC MVP)
Einstein Technologies
Tablet Enhancements for Outlook - Try it free: www.tabletoutlook.com


"Ravi" <Ravi@discussions.microsoft.com> wrote in message
news:6CE01704-9822-46D3-BA4A-28CA65942D76@microsoft.com...
>I think the things can be done and that is for sure.
>
> Ok Please tell me that
> when we are making any changes in display settings there is a flicker or
> not
> in windows embedded ce.
>
> When we right click on DESKTOP then go to PROPERTIES then SETTINGS and
> changing SCREEN RESOLUTION so then is there any flickering in windows
> embedded ce or windows embedded xp.
>
> i am using enumdisplaydevice to get device name
> then enumdisplaysettings for getting display settings
>
> VIDEOPARAMETERS test;
> test.dwFlickerFilter = 1000;
>
> then ChangeDisplaySettingsEx(device.DeviceName, &dm, NULL,
> CDS_VIDEOPARAMETERS | CDS_UPDATEREGISTRY,&test);
> to change display settings.
> but the things are not working out.
>
> All of the steps are taken in windows xp and coding is done in VS 2005