Change Resolution

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2 total messages Started by George Fri, 14 Nov 2003 09:52

#506

Author: George
Date: Fri, 14 Nov 2003 09:52

26 lines
1606 bytes

Hi,

I'm using that code:

   DEVMODE devicemode;
   memset(&devicemode,0,sizeof(devicemode));
   devicemode.dmBitsPerPel  = 16;
   devicemode.dmPelsWidth   = 1280;
   devicemode.dmPelsHeight  = 1024;
   devicemode.dmDisplayFrequency=75;
   devicemode.dmSize        = sizeof(devicemode);
   devicemode.dmFields      = DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;
   devicemode.dmDisplayFlags= NULL;
   ChangeDisplaySettings(&devicemode,CDS_UPDATEREGISTRY);



that must change the resolution to 1280x1024 16bits in 75Hz.

It goes to 1280x1024 but it goes to 60 not to 70Hz !
If I go manually to the Display Properties, I can switch to 70Hz without
problems (or restart).

I'm running Windows XP Pro.

Thank you!

Re: Change Resolution

#513

Author: Rodrigo G�mez
Date: Wed, 26 Nov 2003 15:50

40 lines
2195 bytes

I don't know if this is a typo, but you are setting dmDisplayFrequency to 75
but later talking about 70. It could be possible that 75 is not a valid
value for your monitor, so it "reverts" to the lowest setting. Have you
tryed with 70?

HTH,

-- 
Rodrigo G�mez

"George" <george@nospam.org> escribi� en el mensaje
news:3fb49782@newsgroups.borland.com...
> Hi,
>
> I'm using that code:
>
>    DEVMODE devicemode;
>    memset(&devicemode,0,sizeof(devicemode));
>    devicemode.dmBitsPerPel  = 16;
>    devicemode.dmPelsWidth   = 1280;
>    devicemode.dmPelsHeight  = 1024;
>    devicemode.dmDisplayFrequency=75;
>    devicemode.dmSize        = sizeof(devicemode);
>    devicemode.dmFields      = DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;
>    devicemode.dmDisplayFlags= NULL;
>    ChangeDisplaySettings(&devicemode,CDS_UPDATEREGISTRY);
>
>
>
> that must change the resolution to 1280x1024 16bits in 75Hz.
>
> It goes to 1280x1024 but it goes to 60 not to 70Hz !
> If I go manually to the Display Properties, I can switch to 70Hz without
> problems (or restart).
>
> I'm running Windows XP Pro.
>
> Thank you!
>
>

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