an application to detect dead pixels of LCD pixel

**Mark Salsbery [MVP]** · Apr 10 '08, 05:35 PM

Re: an application to detect dead pixels of LCD pixel

"Kelvin" <Kelvin@discuss ions.microsoft. comwrote in message
news:3129128E-8B56-4877-BADC-1ED3AF889334@mi crosoft.com...

Hi all,
>
I am writing an application to detect the dead pixel of LCD panel by using
visual C++ (MFC). My flow is follow:
>
1. Display a dialog with a start button. When the user press the start
button. The whole screen become black colour.
2. When the user press any key by keyboard. The whole screen changes to
red
then green, blue and white.
3. The screen back to "normal display".
>
I am a newbie in visual c++, so i don't know how to write the code to
achieve points 2 and 3.

Fill screen with red:

CWnd DesktopWnd;
DesktopWnd.Atta ch(::GetDesktop Window());
CWindowDC DesktopDC(&Desk topWnd);
CBrush RedBrush(RGB(0x FF,0x00,0x00));
CRect DesktopRect;
DesktopWnd.GetW indowRect(&Desk topRect);
DesktopDC.FillR ect(&DesktopRec t, &RedBrush);
DesktopWnd.Deta ch();

Restore screen to normal display:

::InvalidateRec t(NULL, NULL, TRUE);

BTW, there's an MFC newsgroup: microsoft.publi c.vc.mfc

Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

>
Can anyone know how to write code for this application?
>
Thank a lot.
>

**Ben Voigt [C++ MVP]** · Apr 10 '08, 06:25 PM

Re: an application to detect dead pixels of LCD pixel

Mark Salsbery [MVP] wrote:

"Kelvin" <Kelvin@discuss ions.microsoft. comwrote in message
news:3129128E-8B56-4877-BADC-1ED3AF889334@mi crosoft.com...

>Hi all,
>>
>I am writing an application to detect the dead pixel of LCD panel by
>using visual C++ (MFC). My flow is follow:
>>
>1. Display a dialog with a start button. When the user press the
>start button. The whole screen become black colour.
>2. When the user press any key by keyboard. The whole screen changes
>to red
>then green, blue and white.
>3. The screen back to "normal display".
>>
>I am a newbie in visual c++, so i don't know how to write the code to
>achieve points 2 and 3.

>
Fill screen with red:
>
CWnd DesktopWnd;
DesktopWnd.Atta ch(::GetDesktop Window());
CWindowDC DesktopDC(&Desk topWnd);
CBrush RedBrush(RGB(0x FF,0x00,0x00));
CRect DesktopRect;
DesktopWnd.GetW indowRect(&Desk topRect);
DesktopDC.FillR ect(&DesktopRec t, &RedBrush);
DesktopWnd.Deta ch();

Don't try to draw on the desktop window, create your own fullscreen window.

>
Restore screen to normal display:
>

>>InvalidateRec t(NULL, NULL, TRUE);

>
>
BTW, there's an MFC newsgroup: microsoft.publi c.vc.mfc
>
Mark
>
>

>>
>Can anyone know how to write code for this application?
>>
>Thank a lot.

**Mark Salsbery [MVP]** · Apr 10 '08, 07:05 PM

Re: an application to detect dead pixels of LCD pixel

"Ben Voigt [C++ MVP]" <rbv@nospam.nos pamwrote in message
news:Ow6wkbzmIH A.3532@TK2MSFTN GP05.phx.gbl...

Mark Salsbery [MVP] wrote:

>"Kelvin" <Kelvin@discuss ions.microsoft. comwrote in message
>news:3129128 E-8B56-4877-BADC-1ED3AF889334@mi crosoft.com...

>>Hi all,
>>>
>>I am writing an application to detect the dead pixel of LCD panel by
>>using visual C++ (MFC). My flow is follow:
>>>
>>1. Display a dialog with a start button. When the user press the
>>start button. The whole screen become black colour.
>>2. When the user press any key by keyboard. The whole screen changes
>>to red
>>then green, blue and white.
>>3. The screen back to "normal display".
>>>
>>I am a newbie in visual c++, so i don't know how to write the code to
>>achieve points 2 and 3.

>>
>Fill screen with red:
>>
>CWnd DesktopWnd;
>DesktopWnd.Att ach(::GetDeskto pWindow());
>CWindowDC DesktopDC(&Desk topWnd);
>CBrush RedBrush(RGB(0x FF,0x00,0x00));
>CRect DesktopRect;
>DesktopWnd.Get WindowRect(&Des ktopRect);
>DesktopDC.Fill Rect(&DesktopRe ct, &RedBrush);
>DesktopWnd.Det ach();

>
Don't try to draw on the desktop window, create your own fullscreen
window.

Sure, take away all my fun. :)

Cheers,
Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

>

>>
>Restore screen to normal display:
>>

>>>InvalidateRe ct(NULL, NULL, TRUE);

>>
>>
>BTW, there's an MFC newsgroup: microsoft.publi c.vc.mfc
>>
>Mark
>>
>>

>>>
>>Can anyone know how to write code for this application?
>>>
>>Thank a lot.

>
>

**=?Utf-8?B?S2Vsdmlu?=** · Apr 11 '08, 03:55 AM

Re: an application to detect dead pixels of LCD pixel

Hi,

Thanks for your help!

Sorry that I still don't know how to "make" the whole screen to become black
when pressing the start button.

Could you told me how to achieve this?

Thanks a lot.

"Mark Salsbery [MVP]" wrote:

"Ben Voigt [C++ MVP]" <rbv@nospam.nos pamwrote in message
news:Ow6wkbzmIH A.3532@TK2MSFTN GP05.phx.gbl...

Mark Salsbery [MVP] wrote:

"Kelvin" <Kelvin@discuss ions.microsoft. comwrote in message
news:3129128E-8B56-4877-BADC-1ED3AF889334@mi crosoft.com...
>Hi all,
>>
>I am writing an application to detect the dead pixel of LCD panel by
>using visual C++ (MFC). My flow is follow:
>>
>1. Display a dialog with a start button. When the user press the
>start button. The whole screen become black colour.
>2. When the user press any key by keyboard. The whole screen changes
>to red
>then green, blue and white.
>3. The screen back to "normal display".
>>
>I am a newbie in visual c++, so i don't know how to write the code to
>achieve points 2 and 3.
>
Fill screen with red:
>
CWnd DesktopWnd;
DesktopWnd.Atta ch(::GetDesktop Window());
CWindowDC DesktopDC(&Desk topWnd);
CBrush RedBrush(RGB(0x FF,0x00,0x00));
CRect DesktopRect;
DesktopWnd.GetW indowRect(&Desk topRect);
DesktopDC.FillR ect(&DesktopRec t, &RedBrush);
DesktopWnd.Deta ch();

Don't try to draw on the desktop window, create your own fullscreen
window.

>
>
Sure, take away all my fun. :)
>
>
Cheers,
Mark
>
--
Mark Salsbery
Microsoft MVP - Visual C++
>
>
>

>
Restore screen to normal display:
>
>>InvalidateRec t(NULL, NULL, TRUE);
>
>
BTW, there's an MFC newsgroup: microsoft.publi c.vc.mfc
>
Mark
>
>
>>
>Can anyone know how to write code for this application?
>>
>Thank a lot.

**=?Utf-8?B?S2Vsdmlu?=** · Apr 11 '08, 04:05 AM

Re: an application to detect dead pixels of LCD pixel

My code is follow:

void CTestScreenDlg: :OnButtonStart( )
{
// TODO: Add your control notification handler code here
CWnd DesktopWnd;
DesktopWnd.Atta ch(::GetDesktop Window());
CWindowDC DesktopDC(&Desk topWnd);
CBrush RedBrush(RGB(0x FF,0x00,0x00));
CRect DesktopRect;
DesktopWnd.GetW indowRect(&Desk topRect);
DesktopDC.FillR ect(&DesktopRec t, &RedBrush);
DesktopWnd.Deta ch();

}

but i cannot make the whole screen become red......

"Kelvin" wrote:

Hi,
>
Thanks for your help!
>
Sorry that I still don't know how to "make" the whole screen to become black
when pressing the start button.
>
Could you told me how to achieve this?
>
Thanks a lot.
>
>
"Mark Salsbery [MVP]" wrote:
>

"Ben Voigt [C++ MVP]" <rbv@nospam.nos pamwrote in message
news:Ow6wkbzmIH A.3532@TK2MSFTN GP05.phx.gbl...

Mark Salsbery [MVP] wrote:
>"Kelvin" <Kelvin@discuss ions.microsoft. comwrote in message
>news:3129128 E-8B56-4877-BADC-1ED3AF889334@mi crosoft.com...
>>Hi all,
>>>
>>I am writing an application to detect the dead pixel of LCD panel by
>>using visual C++ (MFC). My flow is follow:
>>>
>>1. Display a dialog with a start button. When the user press the
>>start button. The whole screen become black colour.
>>2. When the user press any key by keyboard. The whole screen changes
>>to red
>>then green, blue and white.
>>3. The screen back to "normal display".
>>>
>>I am a newbie in visual c++, so i don't know how to write the code to
>>achieve points 2 and 3.
>>
>Fill screen with red:
>>
>CWnd DesktopWnd;
>DesktopWnd.Att ach(::GetDeskto pWindow());
>CWindowDC DesktopDC(&Desk topWnd);
>CBrush RedBrush(RGB(0x FF,0x00,0x00));
>CRect DesktopRect;
>DesktopWnd.Get WindowRect(&Des ktopRect);
>DesktopDC.Fill Rect(&DesktopRe ct, &RedBrush);
>DesktopWnd.Det ach();
>
Don't try to draw on the desktop window, create your own fullscreen
window.

Sure, take away all my fun. :)

Cheers,
Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

>
>>
>Restore screen to normal display:
>>
>>>InvalidateRe ct(NULL, NULL, TRUE);
>>
>>
>BTW, there's an MFC newsgroup: microsoft.publi c.vc.mfc
>>
>Mark
>>
>>
>>>
>>Can anyone know how to write code for this application?
>>>
>>Thank a lot.
>
>

**Mark Salsbery [MVP]** · Apr 11 '08, 05:35 AM

Re: an application to detect dead pixels of LCD pixel

That code worked for me, but as Ben mentioned, you should create a window,
make it the size of the screen, and do the drawing on that window.

The system refreshes the desktop when you draw on it, at least it did to me
on Vista :)

Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

"Kelvin" <Kelvin@discuss ions.microsoft. comwrote in message
news:CF98DEB5-243E-43DF-B502-FE043B919EC4@mi crosoft.com...

My code is follow:
>
void CTestScreenDlg: :OnButtonStart( )
{
// TODO: Add your control notification handler code here
CWnd DesktopWnd;
DesktopWnd.Atta ch(::GetDesktop Window());
CWindowDC DesktopDC(&Desk topWnd);
CBrush RedBrush(RGB(0x FF,0x00,0x00));
CRect DesktopRect;
DesktopWnd.GetW indowRect(&Desk topRect);
DesktopDC.FillR ect(&DesktopRec t, &RedBrush);
DesktopWnd.Deta ch();
>
}
>
but i cannot make the whole screen become red......
>
>
>
"Kelvin" wrote:
>

>Hi,
>>
>Thanks for your help!
>>
>Sorry that I still don't know how to "make" the whole screen to become
>black
>when pressing the start button.
>>
>Could you told me how to achieve this?
>>
>Thanks a lot.
>>
>>
>"Mark Salsbery [MVP]" wrote:
>>

"Ben Voigt [C++ MVP]" <rbv@nospam.nos pamwrote in message
news:Ow6wkbzmIH A.3532@TK2MSFTN GP05.phx.gbl...
Mark Salsbery [MVP] wrote:
>"Kelvin" <Kelvin@discuss ions.microsoft. comwrote in message
>news:3129128 E-8B56-4877-BADC-1ED3AF889334@mi crosoft.com...
>>Hi all,
>>>
>>I am writing an application to detect the dead pixel of LCD panel
>>by
>>using visual C++ (MFC). My flow is follow:
>>>
>>1. Display a dialog with a start button. When the user press the
>>start button. The whole screen become black colour.
>>2. When the user press any key by keyboard. The whole screen
>>changes
>>to red
>>then green, blue and white.
>>3. The screen back to "normal display".
>>>
>>I am a newbie in visual c++, so i don't know how to write the code
>>to
>>achieve points 2 and 3.
>>
>Fill screen with red:
>>
>CWnd DesktopWnd;
>DesktopWnd.Att ach(::GetDeskto pWindow());
>CWindowDC DesktopDC(&Desk topWnd);
>CBrush RedBrush(RGB(0x FF,0x00,0x00));
>CRect DesktopRect;
>DesktopWnd.Get WindowRect(&Des ktopRect);
>DesktopDC.Fill Rect(&DesktopRe ct, &RedBrush);
>DesktopWnd.Det ach();
>
Don't try to draw on the desktop window, create your own fullscreen
window.
>
>
Sure, take away all my fun. :)
>
>
Cheers,
Mark
>
--
Mark Salsbery
Microsoft MVP - Visual C++
>
>
>
>
>>
>Restore screen to normal display:
>>
>>>InvalidateRe ct(NULL, NULL, TRUE);
>>
>>
>BTW, there's an MFC newsgroup: microsoft.publi c.vc.mfc
>>
>Mark
>>
>>
>>>
>>Can anyone know how to write code for this application?
>>>
>>Thank a lot.
>
>

**=?Utf-8?B?S2Vsdmlu?=** · Jun 27 '08, 07:59 PM

Re: an application to detect dead pixels of LCD pixel

Hi Marks,

Thanks a lot. I can use the code to display red color on the entire screen.

But, how to create a window, make the size of the screen and retrieves the
device context (DC) for that window?

Thanks,
Tim

"Mark Salsbery [MVP]" wrote:

That code worked for me, but as Ben mentioned, you should create a window,
make it the size of the screen, and do the drawing on that window.
>
The system refreshes the desktop when you draw on it, at least it did to me
on Vista :)
>
Mark
>
--
Mark Salsbery
Microsoft MVP - Visual C++
>
>
"Kelvin" <Kelvin@discuss ions.microsoft. comwrote in message
news:CF98DEB5-243E-43DF-B502-FE043B919EC4@mi crosoft.com...

My code is follow:

void CTestScreenDlg: :OnButtonStart( )
{
// TODO: Add your control notification handler code here
CWnd DesktopWnd;
DesktopWnd.Atta ch(::GetDesktop Window());
CWindowDC DesktopDC(&Desk topWnd);
CBrush RedBrush(RGB(0x FF,0x00,0x00));
CRect DesktopRect;
DesktopWnd.GetW indowRect(&Desk topRect);
DesktopDC.FillR ect(&DesktopRec t, &RedBrush);
DesktopWnd.Deta ch();

}

but i cannot make the whole screen become red......

"Kelvin" wrote:

Hi,
>
Thanks for your help!
>
Sorry that I still don't know how to "make" the whole screen to become
black
when pressing the start button.
>
Could you told me how to achieve this?
>
Thanks a lot.
>
>
"Mark Salsbery [MVP]" wrote:
>
"Ben Voigt [C++ MVP]" <rbv@nospam.nos pamwrote in message
news:Ow6wkbzmIH A.3532@TK2MSFTN GP05.phx.gbl...
Mark Salsbery [MVP] wrote:
>"Kelvin" <Kelvin@discuss ions.microsoft. comwrote in message
>news:3129128 E-8B56-4877-BADC-1ED3AF889334@mi crosoft.com...
>>Hi all,
>>>
>>I am writing an application to detect the dead pixel of LCD panel
>>by
>>using visual C++ (MFC). My flow is follow:
>>>
>>1. Display a dialog with a start button. When the user press the
>>start button. The whole screen become black colour.
>>2. When the user press any key by keyboard. The whole screen
>>changes
>>to red
>>then green, blue and white.
>>3. The screen back to "normal display".
>>>
>>I am a newbie in visual c++, so i don't know how to write the code
>>to
>>achieve points 2 and 3.
>>
>Fill screen with red:
>>
>CWnd DesktopWnd;
>DesktopWnd.Att ach(::GetDeskto pWindow());
>CWindowDC DesktopDC(&Desk topWnd);
>CBrush RedBrush(RGB(0x FF,0x00,0x00));
>CRect DesktopRect;
>DesktopWnd.Get WindowRect(&Des ktopRect);
>DesktopDC.Fill Rect(&DesktopRe ct, &RedBrush);
>DesktopWnd.Det ach();
>
Don't try to draw on the desktop window, create your own fullscreen
window.

Sure, take away all my fun. :)

Cheers,
Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

>
>>
>Restore screen to normal display:
>>
>>>InvalidateRe ct(NULL, NULL, TRUE);
>>
>>
>BTW, there's an MFC newsgroup: microsoft.publi c.vc.mfc
>>
>Mark
>>
>>
>>>
>>Can anyone know how to write code for this application?
>>>
>>Thank a lot.
>
>

**Mark Salsbery [MVP]** · Jun 27 '08, 07:59 PM

Re: an application to detect dead pixels of LCD pixel

"Kelvin" <Kelvin@discuss ions.microsoft. comwrote in message
news:82FB1AD9-8D31-471D-89C4-46ACDD6F38B3@mi crosoft.com...

Hi Marks,
>
Thanks a lot. I can use the code to display red color on the entire
screen.
>
But, how to create a window, make the size of the screen and retrieves the
device context (DC) for that window?
>

Hi Tim,

Sorry for the delayed reply. I was out of town all last week.

If you still need an example of creating a full screen colored window,
here's some code...

//-----------------------------------------------------
// FullScreenColor Wnd.h
//-----------------------------------------------------

#pragma once
#include "afxwin.h"

// CFullScreenColo rWnd

class CFullScreenColo rWnd : public CFrameWnd
{
DECLARE_DYNAMIC (CFullScreenCol orWnd)

public:
CFullScreenColo rWnd();
virtual ~CFullScreenCol orWnd();

protected:
DECLARE_MESSAGE _MAP()
virtual BOOL PreCreateWindow (CREATESTRUCT& cs);
public:
afx_msg int OnCreate(LPCREA TESTRUCT lpCreateStruct) ;
afx_msg BOOL OnEraseBkgnd(CD C* pDC);
afx_msg void OnLButtonDown(U INT nFlags, CPoint point);

CBrush m_BkgndBrush;
};

//-----------------------------------------------------
// FullScreenColor Wnd.cpp
//-----------------------------------------------------

#include "stdafx.h"
#include "FullScreenColo rWnd.h"

// CFullScreenColo rWnd

IMPLEMENT_DYNAM IC(CFullScreenC olorWnd, CFrameWnd)

CFullScreenColo rWnd::CFullScre enColorWnd()
{
m_BkgndBrush.Cr eateSolidBrush( RGB(0xFF,0x00,0 x00));
}

CFullScreenColo rWnd::~CFullScr eenColorWnd()
{
}

BEGIN_MESSAGE_M AP(CFullScreenC olorWnd, CFrameWnd)
ON_WM_ERASEBKGN D()
ON_WM_LBUTTONDO WN()
ON_WM_CREATE()
END_MESSAGE_MAP ()

// CFullScreenColo rWnd message handlers

BOOL CFullScreenColo rWnd::PreCreate Window(CREATEST RUCT& cs)
{
BOOL ret = CFrameWnd::PreC reateWindow(cs) ;

cs.style = WS_VISIBLE | WS_POPUP;
cs.dwExStyle = 0;

return ret;
}

int CFullScreenColo rWnd::OnCreate( LPCREATESTRUCT lpCreateStruct)
{
if (CFrameWnd::OnC reate(lpCreateS truct) == -1)
return -1;

HDC ScreenDC = ::GetDC(NULL);
MoveWindow(0, 0, ::GetDeviceCaps (ScreenDC, HORZRES),
::GetDeviceCaps (ScreenDC, VERTRES));
::ReleaseDC(NUL L, ScreenDC);

return 0;
}

BOOL CFullScreenColo rWnd::OnEraseBk gnd(CDC* pDC)
{
CRect CliRect;
GetClientRect(& CliRect);
pDC->FillRect(&CliR ect, &m_BkgndBrus h);

return TRUE;
}

void CFullScreenColo rWnd::OnLButton Down(UINT nFlags, CPoint point)
{
DestroyWindow() ;
}

//-----------------------------------------------------
// Example creating the window - click on the window to destroy it
//-----------------------------------------------------

CFullScreenColo rWnd *pFullScreenCol orWnd = new CFullScreenColo rWnd();
pFullScreenColo rWnd->Create(NULL, _T(""));

Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

Thanks,
Tim
>
>

an application to detect dead pixels of LCD pixel

an application to detect dead pixels of LCD pixel

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