C / C++ / MFC Discussion Boards

Re: get file size ?

toxcct13-Apr-06 5:59

toxcct

13-Apr-06 5:59

Hockey, i'm truly sorry... i intended to give you a '5', but my mouse moved wrongly Frown | :(

Re: get file size ?

David Crow13-Apr-06 5:59

David Crow

13-Apr-06 5:59

How about GetFileSize()?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: get file size ?

big_denny_20013-Apr-06 7:21

big_denny_200

13-Apr-06 7:21

hi David

as I see GetFileSize() needs HANDLE to a file as a parameter , that means as i know I need to open the file for reading at least.

I need to retrieve sizes of files in loop. I did it by opening them and calling GetLength method, but it seemd ugly
Frown | :(

<br />
for(...)<br />
{<br />
  CFile file<br />
  file.Open(path,CFile::modeRead)<br />
  Length[i] = file.GetLength()<br />
  file.Close()<br />
}<br />

Is not there any API like this for example?

ULONGLONG GetFileSize(LPCTSTR sPath);

or any more convenient way?

thank you

Re: get file size ?

David Crow13-Apr-06 7:46

David Crow

13-Apr-06 7:46

big_denny_200 wrote:
I did it by opening them and calling GetLength method, but it seemd ugly

But does it work, and is it easy to understand both now and in the future?

big_denny_200 wrote:

Is not there any API like this for example?

There's also _stat().

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: get file size ?

Joe Woodbury13-Apr-06 14:04

Joe Woodbury

13-Apr-06 14:04

Call ::FindFirstFile() will the path. Do remember to close the handle and all that if it succeeds.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Pointer to method

Virtek13-Apr-06 5:46

Virtek

13-Apr-06 5:46

Hello.

I'm trying to make a pointer to a method of instance of some class, like this:

<br />
<br />
class Foo<br />
{<br />
public:<br />
    void DoSomething(int a)<br />
    {<br />
        ......<br />
    }<br />
};<br />
<br />
int main()<br />
{<br />
   typedef void MethodCallback(int a);<br />
   <br />
   Foo *x = new Foo;<br />
   MethodCallback *MC = (MethodCallback *)x->DoSomething; // Throws an error!<br />
}<br />
<br />

Works only if I change to static method.....

Any idia how to do this correctly ?

Thanks,

David

Re: Pointer to method

toxcct13-Apr-06 5:52

toxcct

13-Apr-06 5:52

Virtek wrote:
// Throws an error!

which error D'Oh! | :doh:

Re: Pointer to method

alex.barylski13-Apr-06 5:55

alex.barylski

13-Apr-06 5:55

I believe you can't use what you have shown because of the objects 'this' pointer, thats why it works when you make it a static method.

Check these out:

Pointers to methods[^]

It's frustrating being a genius and living the life of a moron!!!

Re: Pointer to method

Michael Dunn13-Apr-06 7:11

Michael Dunn

13-Apr-06 7:11

See the FAQ
6.5 How do I declare and use a pointer to a class member function?[^]

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | NEW!! PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

Re: Pointer to method

Virtek13-Apr-06 11:06

Virtek

13-Apr-06 11:06

Thanks people.

I needed to pass a function pointer to an API function, and because i did a class-wrapping, i needed to pass the class member-function, but it's not possible (thanks for clearing my eyes about the "this" pointer issue...)

nmake missing?

alex.barylski13-Apr-06 5:41

alex.barylski

13-Apr-06 5:41

Edit2 Sounds like nmake doesn't ship with just the compiler and linker tools - sounds like I have to download the SDK as well???

Edit I should note that vcvars32.bat has been run...

I've downloaded the free Visual C++ toolkit from MS web site: http://msdn.microsoft.com/visualc/vctoolkit2003/[^]

I have an application which uses NMAKE.EXE but it doesn't seem to exists with just the toolkit???

Do I have to download and install the Visual C++ IDE Express version???

Thanks Smile | :)

It's frustrating being a genius and living the life of a moron!!!

-- modified at 12:08 Thursday 13th April, 2006

C++ application can't run on the XP

luweiwen13-Apr-06 4:00

luweiwen

13-Apr-06 4:00

I try to run my application on one XP PC without visual studio 2005 installed, but failed, the error is like "cannot initialize properly" or "the application is not installed correctly".

So I try to run an application that is built from MFC wizards, without any change of the codes, the same problem happens to me, even i intall the framework 2.0.

One way to make it work is to compile it in MT mode, the other is install vs2005 on that PC, but I don't think these are the final solution, could anyone help me?

-- modified at 10:04 Thursday 13th April, 2006
The application is developed by vs2005 in windows 2000

Re: C++ application can't run on the XP

toxcct13-Apr-06 4:12

toxcct

13-Apr-06 4:12

the error might tell you that a DLL is missing.
provide these dll with your exe.

Re: C++ application can't run on the XP

luweiwen13-Apr-06 4:17

luweiwen

13-Apr-06 4:17

hi, thanks for your help.

I have tried copy all the dlls that i see from the dll dependency, but it can't work, as i know, in vs2002/vs2003, we only need to copy mfc70.dll and msvcr70.dll (maybe this name), but it looks not the same to vs2005. I even install the framework 2.0 actually.

Re: C++ application can't run on the XP

toxcct13-Apr-06 4:18

toxcct

13-Apr-06 4:18

Dependency Walker[^]

Re: C++ application can't run on the XP

Cedric Moonen13-Apr-06 4:18

Cedric Moonen

13-Apr-06 4:18

Not only. With VS2005, they included a mechanism with manifest files. I cannot explain how it works but the only thing I can say is that it is much more complicated to deploy your applications.

Re: C++ application can't run on the XP

toxcct13-Apr-06 4:26

toxcct

13-Apr-06 4:26

WTF did they do that for ?! Mad | :mad:

Re: C++ application can't run on the XP

Cedric Moonen13-Apr-06 4:33

Cedric Moonen

13-Apr-06 4:33

It is kind of complicated. In fact it is done (if I'm not wrong) to avoid dll hell problems (problems with versioning of dll's). I don't know exactly who it works but this mechanism was already available for 2003 but it was optional. Now it is no more otherwise nobody would use it.

Re: C++ application can't run on the XP

Cedric Moonen13-Apr-06 4:20

Cedric Moonen

13-Apr-06 4:20

Maybe this link[^] will help.

Re: C++ application can't run on the XP

Trollslayer13-Apr-06 4:35

Trollslayer

13-Apr-06 4:35

Have you copied MFC over or used a static link in the second case?

The tigress is here Big Grin | :-D

Re: C++ application can't run on the XP

jayart13-Apr-06 5:40

jayart

13-Apr-06 5:40

Have you checked with the service pack of XP? Is it the latest?

Re: C++ application can't run on the XP

luweiwen13-Apr-06 6:17

luweiwen

13-Apr-06 6:17

Hi all, great thanks for your help, it works now^_^

It looks that i didn't put "Microsoft Visual Studio 8\VC\redist\x86\Microsoft.VC80.CRT" and "Microsoft Visual Studio 8\VC\redist\x86\Microsoft.VC80.MFC" to the exe folder. So easy, so complicated...

Best regards/Lu Weiwen

Question about keyboard event in C/C++

Yanshof13-Apr-06 3:13

Yanshof

13-Apr-06 3:13

Hi All

I need to write some application that will be work in the background of the task manager and will "here" all keyboard event.
In case that the user press on the key ALT+T the application will be do something ( like open some WAV file ).

I don't know how i start this application.... Confused | :confused:

My question are :

1.How my application will work in the background of the operation system and "listen" to all keyboard click ?
2.How can i "here" all click without intercept all other application in the background to get also the keyboard event ?
3.I need this application to run on every start up of the machine - how do i do it ?
4.Where/how can i found any demo code that i can see it ?

Thanks for any help. Rose | [Rose]

-- modified at 9:29 Thursday 13th April, 2006

Re: Question about keyboard event in C/C++

David Crow13-Apr-06 3:18

David Crow

13-Apr-06 3:18

See if SetWindowsHookEx() is of any help.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Question about keyboard event in C/C++

Yanshof13-Apr-06 3:29

Yanshof

13-Apr-06 3:29

Thanks ,

But i need something with more interpret.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.