creating directx texture from raw image data - C / C++ / MFC Discussion Boards

Re: How to prevent screen capture? [modified]

hxhl959-Nov-09 10:38

hxhl95

9-Nov-09 10:38

Hook the function responsible for screenshotting.

EDIT: oh sorry, I didn't notice the "web application" part of that.

modified on Tuesday, November 10, 2009 11:31 PM

Re: How to prevent screen capture? [modified]

semaphore19-Nov-09 19:48

semaphore1

9-Nov-09 19:48

OK,I changed idea.
Now I am creating desktop application instead of web application which needs to block print screen and screen capture. The print screen can be blocked by registering the hot key but now i am trying to find any message/method called on application when other applications try to grab pixels from its window. I am trying to do this in VC++

Is it possible?

Thanks
Mahendra

modified on Tuesday, November 10, 2009 2:10 AM

Re: How to prevent screen capture?

Midono126-Nov-09 21:00

Midono1

26-Nov-09 21:00

Hi,

any luck? I am tring to do the samething with VC++ too

cheers

Re: How to prevent screen capture?

semaphore126-Nov-09 23:51

semaphore1

26-Nov-09 23:51

Please check this link ,may be helpful for u.

http://www.codeguru.com/forum/showthread.php?p=1893801#post1893801

Re: How to prevent screen capture?

Midono127-Nov-09 3:47

Midono1

27-Nov-09 3:47

any luck

i am trying to do the same here ...........

cheers

Re: How to prevent screen capture?

Ramkrishna Pawar5-Jan-10 7:53

Ramkrishna Pawar

5-Jan-10 7:53

Let me know if anybody is interested in protecting from screen captures. you can contact me at krishnapawar AT gmail DOT com.

Details of Screen Capture Prevention

Gopalakrishna Palem10-Jan-10 0:34

Gopalakrishna Palem

10-Jan-10 0:34

Details on how to prevent screen capture can be found at:
http://gpalem.web.officelive.com/screencap.html#Prevent%20Screen%20Capture[^]

Gopalakrishna
Creator of CFugue Music Library for C++

creating directx texture from raw image data

Andreoli Carlo8-Nov-09 23:58

Andreoli Carlo

8-Nov-09 23:58

My goal:
- display a texture that i can modify in real time (windowing the histogram)

My steps:

1) create an array that will hold my raw information with fast access so i can modify windowing, the array is declared by setting RGB values 8 bit per pixel

// declaring array that will hold raw image
array<Byte> dataArray = gcnew array<Byte>(Length);

2) modify the values of the images and set it to texture

IO::MemoryStream ^fs = gcnew IO::MemoryStream(this->dataArray);
fs->Seek(0,IO::SeekOrigin::Begin);

try {
	mTexture = TextureLoader::FromStream(this->device,
									fs,
									(int)fs->Length,
									768,
									640,
									0,
									Usage::None,
									Format::R8G8B8,
									Pool::Default,
									Filter::None,
									Filter::None,
									0);
}
catch (Direct3D::InvalidDataException ^e) {
	te=e->ToString();
}
fs->Close();

3) display a sprite with texture in it

mSprite->Begin(SpriteFlags::None);
mSprite->Draw(this->mTexture, 
			Rectangle(posx*3,posy*3, 5000,5000),
			Vector3(0.0F, 0.0F, 0.0F),
			Vector3(0.0F, 0.0F, 0.0F), 
			Color::White);
mSprite->End();

the problem is that in this step it die on execution Frown | :(

An unhandled exception of type 'Microsoft.DirectX.Direct3D.Direct3DXException' occurred in Microsoft.DirectX.Direct3DX.dll

Additional information: Error in the application.

Someone can help me point out the problem? thank in advance

TYPE_E_CANTLOADLIBRARY

deadlyabbas8-Nov-09 23:47

deadlyabbas

8-Nov-09 23:47

Hi All,

I tried to build my project in Visual Studio 2008.
I am getting some errors related to TLH files.
I tried to open the type libraries in OLE_VIEW but the some type libraries get easily open where as some gave an error:
Could not decompile selected item
Error loading type library/DLL.
TYPE_E_CANTLOADLIBRARY($80029C4A)

Kindly help me out

Re: TYPE_E_CANTLOADLIBRARY

opedroso221-May-10 8:22

opedroso2

21-May-10 8:22

Hi deadlyabbas,

I am having the same problem.

I was wondering if you ever found a solution.

Thanks,
Osiris

AboutBox

johnjitu8-Nov-09 23:36

johnjitu

8-Nov-09 23:36

Hello everbody

I have small problem in Visual c++ in creating a dialogbox named as Aboutbox,
this is a second dialogbox in my application ,
when i creat the this dialogbox but the following code does not appear in the implementfile.cpp

BOOL CAbout::OnInitDialog()

Should i include myself or Is there another way to do this .

Thanks

waiting for reply.

Re: AboutBox

josda10009-Nov-09 2:47

josda1000

9-Nov-09 2:47

yeah, just make the function yourself. not a big deal.

Re: AboutBox

Stephen Hewitt9-Nov-09 3:18

Stephen Hewitt

9-Nov-09 3:18

There'll be a wizard to add it or you can add in manually.

Steve

Re: AboutBox

johnjitu9-Nov-09 5:25

johnjitu

9-Nov-09 5:25

Thanks to all of u

MFC: Drawing Overlapping Circles

TechAvtar8-Nov-09 23:26

TechAvtar

8-Nov-09 23:26

Hi,

I am trying to draw two circles, which are overlapping . My problem is that the second circle is hiding the first one partially. I want to see both circles completely. Can somebody guide me what parameter should I tweak?

afx_msg void DemoWin::OnPaint ()
{

CPaintDC dc(this);

CRect myRect; /* Define rectangle coordinates */
myRect.top = 0;
myRect.left = 0;
myRect.bottom = 200;
myRect.right = 100;
dc.Ellipse(myRect);

myRect.top = 100;
myRect.left = 50;
myRect.bottom = 200;
myRect.right = 200;
dc.Ellipse(myRect);
}

Thanks
Jacob

Re: MFC: Drawing Overlapping Circles

Cedric Moonen9-Nov-09 0:12

Cedric Moonen

9-Nov-09 0:12

TechAvtar wrote:
My problem is that the second circle is hiding the first one partially. I want to see both circles completely.

What do you mean exactly ? Confused | :confused:

You want the colors of the two circles to be merged ? For instance one circle is white and the other one is white, then the intersection should be gray ?

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: MFC: Drawing Overlapping Circles

KingsGambit9-Nov-09 0:16

KingsGambit

9-Nov-09 0:16

You can select a NULL brush to the device context before drawing the ellipse.
...
dc.SelectObject(GetStockObject(NULL_BRUSH));
dc.Ellipse(myRect);
...

Re: MFC: Drawing Overlapping Circles

TechAvtar9-Nov-09 0:26

TechAvtar

9-Nov-09 0:26

Thanks .This was I looking for.

mysql_query

MsmVc8-Nov-09 20:48

MsmVc

8-Nov-09 20:48

Hi All

I am using mysql_query for create a table in mysql.In normal it's working fine.When i put some wrong column name that mysql_query show execute.But in real condition mysql_query not execute or cursor jump into catch.Here is code

try
	{
CString str;
CString ct="create table longtest(78 varchar(20));"
	mysql_query(conn, ct);

	}
	catch(_com_error pCE)
	{
		str.Format(_T("\n%s Error: %ld\r\n%s\r\n%s\r\n"),
		(TCHAR*)pCE.Source(),
				pCE.Error(),
		(TCHAR*)pCE.Description(),
		(TCHAR*)pCE.ErrorMessage());
		MessageBox(str4,"MySQL to MSSQL");
	}

plz help me

Re: mysql_query

Rajesh R Subramanian8-Nov-09 21:54

Rajesh R Subramanian

8-Nov-09 21:54

MsmVc wrote:
mysql_query(conn, ct);

Does that return a value? If so, you should be checking the return value. Also, what if a different exception that _com_error is thrown? You aren't handling that case either.

PS: This is not a C++ question. Roll eyes | :rolleyes:

“Follow your bliss.” – Joseph Campbell

Re: mysql_query

MsmVc9-Nov-09 0:24

MsmVc

9-Nov-09 0:24

Rajesh R Subramanian wrote:
Does that return a value? If so, you should be checking the return value. Also, what if a different exception that _com_error is thrown? You aren't handling that case either.

Nothing return.

Re: mysql_query

David Crow9-Nov-09 3:04

David Crow

9-Nov-09 3:04

MsmVc wrote:
.In normal it's working fine.When i put some wrong column name that mysql_query show execute.But in real condition mysql_query not execute or cursor jump into catch.

Try as I might, I cannot decipher this. If it is working, then what are you changing to cause it to stop working?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Re: mysql_query

MsmVc9-Nov-09 17:08

MsmVc

9-Nov-09 17:08

when column name length is more 65 then commend show execute but in real it's not execute.SHow i try to find exception here.
plz help me

Re: mysql_query

David Crow10-Nov-09 3:03

David Crow

10-Nov-09 3:03

Just out of curiosity, why would you need a column name to be longer than 65 characters?

Shell_NotifyIcon( NIM_DELETE, ... ) fails on app exit

mkoroudjiev8-Nov-09 19:53

mkoroudjiev

8-Nov-09 19:53

Hello all,

I have quite a strange problem. My program is based on MFC dialog but modeless. It starts hidden and creates a tray icon. The user can exit it in two ways: if the program is visible the user can press the exit button; if the program is not visible the user can right click on the tray icon and press exit. Both of these message handle routines call CWnd::DestryWindow which calls my OnDestroy which calls Shell_NotifyIcon( NIM_DELETE, ... ). On XP and 7 everything works fine but on Vista when the app is exiting through the tray icon message handler the call to Shell_NotifyIcon( NIM_DELETE, ... ) returns FALSE with GetLastError() returning 0. The result is that the icon does not disappear with the exiting of the app but only when the tray bar is refreshed (the mouse goes over it).

Any ideas will be highly appreciated.

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