C / C++ / MFC

31-Jul-07 6:51

Please can anyone tell me how to get and change the contrast/colour/brightness of the screen in C++/MFC.

TIA,
Andy

David Crow31-Jul-07 6:53

31-Jul-07 6:53

The first thing to figure out is how to do it without code. From there, you can start searching through a smaller set of APIs.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

mcsherry31-Jul-07 7:15

31-Jul-07 7:15

Hi,
I'm not sure what your getting at, without code I'd just do:

Display properties->Settings->Advanced->Color and change it there

However searching for these just brings out code which changes the display settings for the app rather than the actual settings in windows.

Andy,

David Crow31-Jul-07 7:27

31-Jul-07 7:27

mcsherry wrote:
I'm not sure what your getting at, without code I'd just do:

Display properties->Settings->Advanced->Color and change it there

That's exactly what I was getting at (which will become clearer in time). However, I have a Color Management tab, and on that tab I see nothing for screen brightness, color, or contrast. Do you have something different?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

mcsherry31-Jul-07 7:36

31-Jul-07 7:36

In addition to the Colour Management tab I have a Colour tab which allows me to manually change the settings.

ok so far I've tried:

CDC *win = GetDesktopWindow()->GetDC() ;
COLORADJUSTMENT col_adj ;

win->GetColorAdjustment ( &col_adj ) ;

col_adj.caBrightness = 100 ;
int err = win->SetColorAdjustment ( &col_adj ) ;

this does return the correct settings for the system however the Set method doesn't actually change anything *that I can see* so I'm assuming I'm looking at the wrong area and changing the wrong settings

David Crow31-Jul-07 7:42

31-Jul-07 7:42

mcsherry wrote:
In addition to the Colour Management tab I have a Colour tab...

Since I cannot reproduce this, you'll need to find which registry keys are changed by the controls on the Color tab.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

led mike31-Jul-07 9:13

led mike

31-Jul-07 9:13

DavidCrow wrote:
Since I cannot reproduce this

Nor I. Could be driver provided for the specific monitor (video card DUH D'Oh! | :doh:

Randor 31-Jul-07 8:15

Randor

31-Jul-07 8:15

You can use GetDeviceGammaRamp() and SetDeviceGammaRamp() to change monitor brightness on videocards that support it. More information in the MSDN: http://msdn2.microsoft.com/en-us/library/ms536529.aspx[^]

All you have to do is call GetDeviceGammaRamp() and iterate through all 256 WORDS and increment them. Higher values == higher brightness.

-Randor (David Delaune)

mcsherry31-Jul-07 8:42

31-Jul-07 8:42

cheers, does what it says on the tin!!! Big Grin | :-D

Andy,

Buttons with images

RomTibi31-Jul-07 6:08

31-Jul-07 6:08

Is it possible to display a small image on a button? Together with a text?
Is it possible in VC++6?

36. When you surround an army, leave an outlet free.
...
Do not press a desperate foe too hard.

SUN-TZU - Art of War

David Crow31-Jul-07 6:50

31-Jul-07 6:50

Start here.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

RomTibi31-Jul-07 9:19

31-Jul-07 9:19

Let's try! Smile | :)

36. When you surround an army, leave an outlet free.
...
Do not press a desperate foe too hard.

SUN-TZU - Art of War

http://www.codeproject.com/buttonctrl/cbuttonst.asp

C^hris L^osinger31-Jul-07 8:48

C^hris L^osinger

31-Jul-07 8:48

image processing toolkits | batch image processing | blogging

RomTibi31-Jul-07 9:18

Button with two or more text lines

31-Jul-07 9:18

Looks very impressive! I hope I will be able to apply the stuff... Thamks! Smile | :)

36. When you surround an army, leave an outlet free.
...
Do not press a desperate foe too hard.

SUN-TZU - Art of War

RomTibi31-Jul-07 6:06

Re: Button with two or more text lines

31-Jul-07 6:06

I want to create a button that has its text on more than one line. If the text is longer it might be useful not to build very wide buttons.

Is it possible in VC++6?

36. When you surround an army, leave an outlet free.
...
Do not press a desperate foe too hard.

SUN-TZU - Art of War

Reagan Conservative31-Jul-07 6:15

Reagan Conservative

31-Jul-07 6:15

Yes. Create a button in the resource editor and type in text. You have to select "Multiline" in the properties under the 'Styles' Tab. You should see the text go to the next line.

John P.

Re: Button with two or more text lines

RomTibi31-Jul-07 6:26

31-Jul-07 6:26

Thanks!() Smile | :)

36. When you surround an army, leave an outlet free.
...
Do not press a desperate foe too hard.

SUN-TZU - Art of War

Multiple lines edit box

RomTibi31-Jul-07 6:04