Re: module definition file - C / C++ / MFC Discussion Boards

JudyL_MD2-Nov-07 8:14

2-Nov-07 8:14

Interesting. I didn't realize you could use the DEF file to do the import on the DLL ~~comusmer~~ consumer side. I've never seen a DLL provider supply a DEF file instead of a LIB file. How did you discover this? I've never seen documentation on a DEF file that said you could use it to import - it's always been mentioned for the export side.

As I said ... interesting. <thoughtful look="">Judy

Re: module definition file

George_George2-Nov-07 19:51

George_George

2-Nov-07 19:51

Hi Judy,

I want to confirm with you that .DEF technique is a general technique for DLL, and it is not a specific technique for COM DLL (in-process server) only. Right?

regards,
George

Re: module definition file

JudyL_MD7-Nov-07 2:41

JudyL_MD

7-Nov-07 2:41

Sorry for the delay in responding, I've been sick for a few days.

George_George wrote:
I want to confirm with you that .DEF technique is a general technique for DLL, and it is not a specific technique for COM DLL (in-process server) only. Right?

Yes

Re: module definition file

George_George7-Nov-07 3:25

George_George

7-Nov-07 3:25

Thanks for considering my question even if you are sick, JudyL_FL.

regards,
George

Re: module definition file

George_George2-Nov-07 19:49

George_George

2-Nov-07 19:49

Thanks Matthew,

I roughly know your ideas. But a real sample of some URL resources to learn will be better about how other components (which is dependent on the DLL) will utilize the .DEF file.

regards,
George

Re: module definition file

JudyL_MD2-Nov-07 2:11

JudyL_MD

2-Nov-07 2:11

If you do not want to use __declspec (dllexport) inside your DLL, it is a way to export the functions from the DLL.

Exporting from a DLL Using DEF Files[^]

Judy

Re: module definition file

George_George2-Nov-07 5:28

George_George

2-Nov-07 5:28

Thanks Judy,

In my understanding of your reply, you mean .DEF file is used for definition of what functions are exported by the DLL. I am wondering what is the differences between .DEF file and.lib file (import library), which is used to do implicit link when another component is dependent on the DLL?

BTW: could you show me a sample how other component will utilize the .DEF file of the DLL please?

regards,
George

Re: module definition file

JudyL_MD2-Nov-07 5:49

JudyL_MD

2-Nov-07 5:49

Note the DEF files are used by DLLs that expose a C interface.

George_George wrote:
In my understanding of your reply, you mean .DEF file is used for definition of what functions are exported by the DLL. I am wondering what is the differences between .DEF file and.lib file (import library), which is used to do implicit link when another component is dependent on the DLL?

The DEF file helps control what goes into the LIB file. A function will be listed as an exported function if a) the function has __declspec (dllexport) atrributes or b) the function name is in the DEF file. The LIB file is called an import library because it is given to users of a DLL to link with to resolve the references to functions in the DLL. The user "imports" the library functions into their code so they can link their executable. Use of an import library means that the user does not have to use LoadLibray and GetProcAddress to access the functions exported by the DLL.

George_George wrote:
BTW: could you show me a sample how other component will utilize the .DEF file of the DLL please?

Other components do not use the DEF file. It is used by the creator of the DLL to generate his DLL / LIB.

The package provided by a DLL provider should include a .h file, a .lib file and a .dll file. That's all that is required for anyone to use the dll. You actually don't need the .lib but it makes it easier for the users of the dll.

Judy

Re: module definition file

George_George2-Nov-07 19:46

George_George

2-Nov-07 19:46

Thanks Judy,

I want to confirm that, if I understand your points correctly, .DEF file is used to manage (or I should use the word *impact*) the import library file (.lib), and the other components which is dependent on the DLL should use import library file (.lib) directly other than use .DEF file. Right?

regards,
George

Re: module definition file

JudyL_MD7-Nov-07 2:44

JudyL_MD

7-Nov-07 2:44

George_George wrote:
I want to confirm that, if I understand your points correctly, .DEF file is used to manage (or I should use the word *impact*) the import library file (.lib), and the other components which is dependent on the DLL should use import library file (.lib) directly other than use .DEF file. Right?

Yes

Re: module definition file

George_George7-Nov-07 3:26

George_George

7-Nov-07 3:26

Thanks for your confirmation, JudyL_FL!

regards,
George

How to open my Mainframe

saravana0011-Nov-07 22:09

saravana001

1-Nov-07 22:09

Hi all,
I want my mainframe to open in the maximized view defaultly,now i'm using the maximize button to do that,can anybody plz help in this.

Regards..
saravana...

Re: How to open my Mainframe

Nelek1-Nov-07 22:30

Nelek

1-Nov-07 22:30

On the last lines of CMyApp::InitInstance ()

if (!ProcessShellCommand(cmdInfo))
return FALSE;

pMainFrame->ShowWindow(m_nCmdShow | SW_SHOWMAXIMIZED);
pMainFrame->UpdateWindow();

return TRUE;

Greetings.

--------
M.D.V.

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Help me to understand what I'm saying, and I'll explain it better to you

Wink | ;)

Re: How to open my Mainframe

saravana0011-Nov-07 22:59

saravana001

1-Nov-07 22:59

thanq nelek..,it is working..plz help mi how to get my child window maximised..

thanks in advance
saravana...

Re: How to open my Mainframe

Nelek1-Nov-07 23:48

Nelek

1-Nov-07 23:48

The principle is the same, but you should place it in CChildFrm::PreCreateWindow (...)

take a look into the info of CREATESTRUCT, specially to the cs.style parameter/flag

PDF creator

c071-Nov-07 21:54

c07

1-Nov-07 21:54

Looking for ways to generate PDF file in VC++/MFC.
I have found some paid libraries. Is there any other ways or some open sources?

Thank you.

I wonder if you are "Googly challenged".

Rajesh R Subramanian1-Nov-07 22:09

Rajesh R Subramanian

1-Nov-07 22:09

Haru[^]

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->ßRÅhmmÃ<-·´¯`·.

Re: I wonder if you are "Googly challenged".

c071-Nov-07 22:29

c07

1-Nov-07 22:29

Thanks.
I'm using google as well but I need to find quick solution so I wanted some good suggestions from nice members like you. Smile | :)

Re: I wonder if you are "Googly challenged".

Rajesh R Subramanian1-Nov-07 22:34

Rajesh R Subramanian

1-Nov-07 22:34

c07 wrote:
I'm using google as well but I need to find quick solution so I wanted some good suggestions

In that case, google for iTextSharp, which I found to be good. But it is to be used only with managed code.

Real men drive manual transmission.

Re: I wonder if you are "Googly challenged".

c071-Nov-07 23:03

c07

1-Nov-07 23:03

thanks again..Do you have experience with Acrobat SDK?

Re: I wonder if you are "Googly challenged".

Rajesh R Subramanian1-Nov-07 23:11

Rajesh R Subramanian

1-Nov-07 23:11

No, I have not worked on Acrobat SDK.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->ßRÅhmmÃ<-·´¯`·.

Re: PDF creator

David Crow2-Nov-07 3:11

David Crow

2-Nov-07 3:11

c07 wrote:
Is there any other ways or some open sources?

Try here.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

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

JPEG to Grayscale conversion [modified]

Rajish Sajayan1-Nov-07 21:34

Rajish Sajayan

1-Nov-07 21:34

Hi,

I have a BYTE pointer it contains the values that i have read from a jpeg file. how can i convert it in to a BYTE pointer of grayscale image.

Thanks in advance

-- modified at 3:39 Friday 2nd November, 2007

Re: JPEG to Grayscale conversion

Nelek1-Nov-07 22:29

Nelek

1-Nov-07 22:29

Take a look in the forum using search. There is a formule to convert RGB into grayscale. Take the value of the RGB byte, use the formule and send it to your grayscale one.

Re: JPEG to Grayscale conversion

C^hris L^osinger2-Nov-07 2:29

C^hris L^osinger

2-Nov-07 2:29

Gray = (R + G + B) / 3

or

Gray = Luminance = .299 * R + .587 * G + .114 * B

image processing toolkits | batch image processing

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