C / C++ / MFC Discussion Boards

georgiek502-Mar-03 1:28

2-Mar-03 1:28

Which version of MSDN do I need? I currently have 6.0 along with MS Visual C++ 6.0. Do I need to upgrade both MSDN and visual C for all the goodies. I couldn't exactly find anything in the index for layered windows in my version.

Re: skinning

Trollslayer2-Mar-03 2:59

Trollslayer

2-Mar-03 2:59

I think is http://msdn.microsoft.com/[^] that is being referred to.

Elaine

The tigress is here Big Grin | :-D

MSC Dislog app with popup window

ianmknight1-Mar-03 13:48

ianmknight

1-Mar-03 13:48

Hi,

I have created a small MFC dialog app with the mfc app wizard and add some control and much function. Now what I would like to do is to add a popup window that I can plot some graphics in. So I added a new class GRAPHIC_WINDOW based on gerenic Cwnd, and then in the class wizard I added the Create msg to the new class GRAPHIC_WINDOW . Now I have added a new button to the CDlg_windDlg class and called the:

BOOL graph_window::Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName, DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID, CCreateContext* pContext)

What happened was a child window in the main dialog window popup, not really what I wanted. So after much searching I figured I need CreateEX()

So I changed to code in graph_window::Create to CreateEX() after much trial and error I almost have a popup window. I say almost bacuase a window is create but it is invisable and fills the desktop along with a half creat item on the task win98 bar... I spent much time now trying to figure out what wrong anyone any idea please..

Brgds Ian Knigh.... Find code below

BOOL graph_window::Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName, DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID, CCreateContext* pContext)
{
// TODO: Add your specialized code here and/or call the base class

//return CWnd::CreateEx( WS_EX_CLIENTEDGE , _T("STATIC"), "MDICLIENT" , WS_BORDER | WS_MAXIMIZE | WS_CLIPCHILDREN | WS_CHILD, rect, 0, 0, 0 );

//AfxHookWindowCreate(this);

return CWnd::CreateEx( WS_EX_CLIENTEDGE ,AfxRegisterWndClass( 0),"Hello World", WS_THICKFRAME |WS_BORDER |WS_POPUP|WS_VISIBLE|WS_BORDER | WS_MAXIMIZE ,rect,NULL,0);

EnableWindow( TRUE );

// Set this as active...
SetActiveWindow();
// ...foreground...
SetForegroundWindow();
// ... and focus window
SetFocus();

// Run the modal loop
// nResult = RunModalLoop();

// Destroy window on exit
// DestroyWindow();

// return CWnd::Create(lpszClassName, lpszWindowName, dwStyle, rect, pParentWnd, nID, pContext);
}

Colors and Alpha

Tomas Petricek1-Mar-03 13:48

Tomas Petricek

1-Mar-03 13:48

Hi,
I need to calculate color, when I use two layers..

bottom layer have color: r1,g1,b1,a1
and top layer have color: r2,g2,b2,a2
but I don't know how to calculate resulting color. Confused | :confused:

Alpha component is:

a=a1+a2*(255-a1)/255;

but I don't know other color components.
(Only when a1==255 => bottom layer is opaque).

Thanks for help!

i'm only pointer to myself

Re: Colors and Alpha

C^hris L^osinger1-Mar-03 18:49

C^hris L^osinger

1-Mar-03 18:49

alpha generally ignores the bottom layer. alpha usually only applies to the top image, it controls overlay transparency and the bottom alpha is unchanged by the overlay image.

-c

When history comes, it always takes you by surprise.

Bobber!

Re: Colors and Alpha

Jörgen Sigvardsson2-Mar-03 13:20

Jörgen Sigvardsson

2-Mar-03 13:20

Surely you must consider the alpha values of all images in the stack if there's a background layer?

--
It's not unusual to be picked up by a klingon woman
It's not unusual to have fun with a klingon
When I see you kicking me around
It's not unusual to see me cry, I wanna die

Re: Colors and Alpha

C^hris L^osinger2-Mar-03 13:38

C^hris L^osinger

2-Mar-03 13:38

just merge each layer onto the background, one at a time, in Z order.

-c

When history comes, it always takes you by surprise.

Bobber!

Creating a shortcut (.LNK file) without using IShellLink

Navin1-Mar-03 10:20

Navin

1-Mar-03 10:20

For eons, I have been creating my start menu links and desktop icons using IShellLink. I have found a serious limitation (for me) though - it does not work very well if trying to create links on a different machine (e.g., a UNC path.)

Is there any way to create a shortcut without using IShellLink? Is the .LNK file format documented anywhere?

OR perhaps there is another way arond this - since my problems are limited to creating shell links on network machines, is it possilbe to create a "dummy" shortcut locally, then copy the .LNK to the remote machine? I can't assume the target file I want to link to will be on the local machine though, it may only be on the remote machine.

Thanks!

You can pick your friends, and you can pick your nose, but you can't pick your friend's nose.

Re: Creating a shortcut (.LNK file) without using IShellLink

Stephane Rodriguez.1-Mar-03 10:31

Stephane Rodriguez.

1-Mar-03 10:31

You can use SHAddToRecentDocs for instance. Here[^] is some code.

Re: Creating a shortcut (.LNK file) without using IShellLink

Navin2-Mar-03 2:29

Navin

2-Mar-03 2:29

THanks, althuogh from looking at it, it seems like it will suffer from the same problem I am having with IShellLink... namely, it doesn't look like it will work very well when creating shortcuts on a different machine.

I will investigate, though. Thanks for the info.

You can pick your friends, and you can pick your nose, but you can't pick your friend's nose.

Working with cameras

Trollslayer1-Mar-03 9:38

Trollslayer

1-Mar-03 9:38

I am writing an application to grab images from a still camera (probably USB) using Visual C++ 6.0.
Most of M$ references are to .NET and windwos XP (I use Win2k).
Any suggestions ?
Thanks.

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Re: Working with cameras

C^hris L^osinger1-Mar-03 9:58

C^hris L^osinger

1-Mar-03 9:58

time to learn about TWAIN

-c

When history comes, it always takes you by surprise.

Bobber!

Re: Working with cameras

Trollslayer2-Mar-03 2:56

Trollslayer

2-Mar-03 2:56

But I thought never the TWAIN shall meet Poke tongue | ;-P

Sorry and thanks for the tip Blush | :O

Elaine (apologetic fluffy tigress)

The tigress is here Big Grin | :-D

Re: Working with cameras

NormDroid2-Mar-03 6:21

NormDroid

2-Mar-03 6:21

MCI?

Help : How do I kill a Quickwin console program ?

pilki1-Mar-03 9:22

pilki

1-Mar-03 9:22

From my Visual C++ Dialog program I need to execute a Quickwin console program, and make it close automatically (under Windows NT).

The problem is, that when the program finishes it displays a messagebox with "Program Terminated, Exit Windows?" with YES/NO buttons.
Is it possible to get this window to close without the user having to press the Yes button?

I've used 'CreateProcess' to run the progam, so that I get the process handle, and was then going to

WaitForSingleObject(process, INFINITE);
CloseHandle(process);

The problem is that whatever I try, I always get the MessageBox - I never get past the 'CreateProcess' to be able to delete the window.

Cheers

Mike

Re: Help : How do I kill a Quickwin console program ?

Jörgen Sigvardsson2-Mar-03 13:22

Jörgen Sigvardsson

2-Mar-03 13:22

It sounds like your Quickwin program is doing something weird. Have you tried ShellExecute()?

--
It's not unusual to be picked up by a klingon woman
It's not unusual to have fun with a klingon
When I see you kicking me around
It's not unusual to see me cry, I wanna die

eigenvalue and eigenvector problem

affzan1-Mar-03 6:45

affzan

1-Mar-03 6:45

Hi guys

Does anyone know how to translate this Matlab code into C++?

function a = fit_ellipse(x,y)<br />
d = [x.*x x.*y y.*y x y ones(size(x))];<br />
s = d'*d;<br />
c(6,6) = 0; c(1,3) = 2; c(2,2) = -1; c(3,1) = 2;<br />
[gevec, geval] = eig(s,c);<br />
[negr, negc] = find(geval < 0 & ~isinf(geval));<br />
a = gevec(:,negc);

i've done up until line 4 but i got stuck on solving the eigenvalue. Can somebody help me please? Thank you so much

Re: eigenvalue and eigenvector problem

mdgray1-Mar-03 7:52

mdgray

1-Mar-03 7:52

See Robert's matrix c++ public domain code

http://www.robertnz.net/nm10.htm

You might also want to get a copy of "Numerical Recipies in C++" It has a really excellent discussion of various algorithms including eigenvalues/vectors.

-Marty

printing excel file

pnpfriend1-Mar-03 6:35

pnpfriend

1-Mar-03 6:35

Can anyone please tell me how to use _Worksheet::PrintOut() method to print excel file.

I tried to set the printArea and print the excel file out as follow;

<br />
_Worksheet sheet;<br />
//common OLE variants. Easy variants to use for calling arguments.<br />
COleVariant covTrue((short)TRUE),covFalse((short)FALSE),covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR);<br />
<br />
//get the excel file name<br />
//open the file<br />
// print it out now<br />
PageSetup pg = sheet.GetPageSetup();<br />
pg.SetPrintArea("$A$!:$H$25;$A$45:$H$60;$J$80:$Z$100");<br />
sheet.PrintOut(covOptional, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional, covOptional);<br />

the nothing got printed..
Am I using PrintOut in wrong way??
Thank You

Re: printing excel file

Tony Fontenot1-Mar-03 14:00

Tony Fontenot

1-Mar-03 14:00

Try using the sheet.GetPageSetup() function.

It will give you the Page Setup object and you can use SetPrintArea() from there. I also had trouble getting SetPrintArea() to work from the sheet itself.

Hope this helps...

***********************
Tony Fontenot
Recreational Solutions
tony@recsolutions.com
***********************

Deskop window subclassing

Lukas Neumann1-Mar-03 5:24

Lukas Neumann

1-Mar-03 5:24

How can I overwrite the drawing function of the Windows shell to customize the appearance of the desktop and its icons? I guess i should use system-wide hook but i don't know how...

What is a class?

Anonymous1-Mar-03 5:18

Anonymous

1-Mar-03 5:18

I wondering what a class is and how you use it and what it does. Thanks

Re: What is a class?

pnpfriend1-Mar-03 6:26

pnpfriend

1-Mar-03 6:26

do you know how to declare the variables types?
for example.. int a; int is a class object or name ( in simple way to say it). You can create your own variable types like int . Your own types could be anything, blablabla, hehehe, employee, newYork, etc

<br />
class newYork<br />
{<br />
};<br />
<br />

Is that what you want to know??

Re: What is a class?

Renjith Ramachandran1-Mar-03 6:53

Renjith Ramachandran

1-Mar-03 6:53

hi please read one c++ book atleast and then ask the questions..

CodeTheDreams();

Re: What is a class?

Chris Richardson1-Mar-03 20:21

Chris Richardson

1-Mar-03 20:21

"CodeTheDreams();" as your sig is really cool too, by the way.

Chris Richardson

C/C++ Include Finder[^]

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