C / C++ / MFC

Re: if I add a text file to the resource, how could I get this file in the programe?

21-Jul-03 20:29

Hi:
I add a text file(or html file) to the resource of the project, how could I get this file in the programe?I want to get its content .Is there any API function to do so?

Thanks
Benben

Eugene Pustovoyt21-Jul-03 20:41

Re: if I add a text file to the resource, how could I get this file in the programe?

21-Jul-03 20:41

And how you have added it?
Has wrote a his path as string resource or how?

Best regards,
Eugene Pustovoyt

benben22-Jul-03 4:42

Re: if I add a text file to the resource, how could I get this file in the programe?

22-Jul-03 4:42

just try "import" the file to your resource

Thanks
Benben

Jens Doose21-Jul-03 22:05

Jens Doose

21-Jul-03 22:05

Try these Win32-API functions:

FindResource

LoadResource

SizeofResource

LockResource

That will do the trick!

Yours,

Jens

Thanks

benben22-Jul-03 0:25

22-Jul-03 0:25

But could you give me an demo?

Thanks
Benben

Re: Thanks

Jens Doose22-Jul-03 1:06

Jens Doose

22-Jul-03 1:06

Sure.
Let's assume you have added a textfile to your resource with ID=IDR_TEXTFILE, and your custom resource type has the name "TEXTFILE".

You can extract the resource with the following code:

#include "stdafx.h"
#include "resource.h"

#include <TCHAR.h>

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
  HRSRC hRsrc = ::FindResource( hInstance,
                                MAKEINTRESOURCE( IDR_TEXTFILE ),
                                _T("TEXTFILE") ); // *** My custom res type

  if ( NULL != hRsrc )
  {
    HGLOBAL hGlob = ::LoadResource( NULL, hRsrc );

    if ( NULL != hGlob )
    {
      DWORD dwSize  = ::SizeofResource( NULL, hRsrc );
      LPVOID lpVoid = ::LockResource( hGlob );

      if ( NULL != lpVoid )
      {
        // *** Now you can work with the loaded resource.

        // *** In this case, we now it is a text file,
        // *** so cast it to a string
        LPCTSTR lpszString = reinterpret_cast< LPCTSTR>( lpVoid );

        MessageBox( NULL, lpszString, _T("From resource"), MB_OK );
      }
    }
  };

  return 0;
}

That's it

Jens

Thanks

benben22-Jul-03 4:32

Amazing problem Help!!!!!!!!!!!!!!!!!!!!!!!!!!!

22-Jul-03 4:32

Thanks
Benben

Re: Thanks

Jens Doose23-Jul-03 21:35

Jens Doose

23-Jul-03 21:35

Hmmm, one annotation:

The more I think about it the more I get convinced, that it is not allowed to just cast the memory pointer to an LPCTSTR, because the trailing zero is missing.
Instead it should be copied to an according buffer.

So it should be:

LPCTSTR lpszString = reinterpret_cast< LPCTSTR>( lpVoid );
TCHAR *tcBuffer    = new TCHAR[ dwSize + 1 ];
if ( NULL != tcBuffer )
{
  ZeroMemory( tcBuffer, ( dwSize + 1 ) * sizeof( TCHAR ) );
  memcpy( tcBuffer, lpszString, dwSize * sizeof( TCHAR ) );
}

But this is only the case with strings.
Byte buffer or similar can't be used directly anyway (like LPCTSTR).

Jens

xxhimanshu21-Jul-03 20:22

xxhimanshu

21-Jul-03 20:22

Hi all,
I want to set the screensaver timeout and screensaver..I can set the screensaver in registry..whereby it changes the screensaver in properties of desktop..but if i change the screensaver timeout in registry it doesnt change in the properties of desktop..until i restart or logoff or shutdown and restart the machine...then the change is reflected..even it doesnt even seem to realize that new value is there in registry..it always takes the value from destop properties..can anyone help..and show me some pointers or ideas on it...any help is highly appreciated..Thanks a lot in advance..

Himanshu

Re: Amazing problem Help!!!!!!!!!!!!!!!!!!!!!!!!!!!

J. Dunlap21-Jul-03 20:39

J. Dunlap

21-Jul-03 20:39

Use SystemParametersInfo, passing:

SPI_SETSCREENSAVEACTIVE to set whether the screensaver is enabled

SPI_SETSCREENSAVETIMEOUT to set the timeout.

"Blessed are the peacemakers, for they shall be called sons of God." - Jesus

"You must be the change you wish to see in the world." - Mahatma Gandhi

Re: Amazing problem Help!!!!!!!!!!!!!!!!!!!!!!!!!!!

xxhimanshu21-Jul-03 21:15

xxhimanshu

21-Jul-03 21:15

hi,
Thanks for the reply..but it does set the screensaver timeout and it is the same as in destop properties..but there is a flaw there..when i set thru systemparametersinfo...it starts running screensaver the same moment it passes thru the statement..I dont want that..I want only the screensaver to be set...not run the screensaver the same time..can u help..

Himanshu

How to use CString variable in regular DLL

Eugene Pustovoyt21-Jul-03 19:01

Re: How to use CString variable in regular DLL

21-Jul-03 19:01

Hi everybody,

How can I use a CString variable in regular DLL.
The compiller say "error C2501: 'CString' : missing storage-class or type specifiers" on my CString variable.

If I include < afxwin.h > to my StdAfx.h then linker say:
"nafxcwd.lib(dllmodul.obj) : error LNK2005: _DllMain@12 already defined in XXX.obj
nafxcwd.lib(dllmodul.obj) : warning LNK4006: _DllMain@12 already defined in XXX.obj; second definition ignored"

Best regards,
Eugene Pustovoyt

Toni7821-Jul-03 19:35

Toni78

21-Jul-03 19:35

My first guess would be to move afxwin.h out of stdafx.h.
If that doesn't work try to add this linker switch /NOD nafxcwd.lib. If that doesn't work either, then I am out of guesses.

Actually, I just had another question, are you linking dynamically to MFC or statically?
If you are linking dynamically you need to add
AFX_MANAGE_STATE(AfxGetStaticModuleState());

// Afterall, I realized that even my comment lines have bugs

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Re: How to use CString variable in regular DLL

Eugene Pustovoyt21-Jul-03 19:56

Re: How to use CString variable in regular DLL

21-Jul-03 19:56

Move afxwin.h had no effect?
And add this linker switch/NOD nafxcwd.lib has resulted in awful consequences (about 1500 errors)

I use a static library.

Toni7821-Jul-03 20:09

Toni78

21-Jul-03 20:09

I was doing some reading on your linker error because I had the same problem once and the only thing that I remembered was doing that /NOD trick. Well, there was more to it that I didn't remember. Sorry about that.
I hope this works now (I got it from MSDN):

There are two ways to resolve this problem. The first solution involves forcing the linker to link the libraries in the correct order. The second solution allows you to find the module that's causing the problem and correct it.

Solution One - Force Linker to Link Libraries in Correct Order

Open the Project Settings dialog box by clicking Settings on the Build menu.

in the Settings For view, select (highlight) the project configuration that's getting the link errors.

Click the Link tab.

Select INPUT in the Category combo box.

In the Libraries to Ignore edit box, insert the library names (for example, Nafxcwd.lib Libcmtd.lib)
NOTE: The linker command line equivalent in /NOD:<library name="">

In the Object/library Modules edit box, insert the library names. You must ensure that these are listed in order and as the first two libraries in the line (for example, Nafxcwd.lib Libcmtd.lib).

Solution Two - Find the Problem Module and Correct It
Perform the following steps to see the current library link order:

Open the Project Settings dialog box by clicking Settings on the Build menu.

In the Settings For view, Select (highlight) the project configuration that's getting the link errors .

Click the Link tab.

Type the following in the Project Options dialog box:
/verbose:lib

Rebuild your project. The libraries will now be listed in the output window during the linking process.

// Afterall, I realized that even my comment lines have bugs

When one cannot invent, one must at least improve (in bed).-My latest fortune cookie

Tranfer double data between dialogs

spaced_out21-Jul-03 17:58

spaced_out

21-Jul-03 17:58

I know this can't be that hard, but I can seem to find it anywhere?

I know how to transfer CStrings between dialogs, but I can't figure out how to transfer double variables between dialogs.

I wish I could type better ...

Eugene Pustovoyt21-Jul-03 19:07

21-Jul-03 19:07

And in what a difference?
If you transfer CString through the pointer then double is transfer through the pointer too.

Best regards,
Eugene Pustovoyt

melwyn21-Jul-03 22:05

melwyn

21-Jul-03 22:05

Why don't you keep a public function in the dialog class which will set the value of the double and call that function from the first dialog?

Regards,
Melwyn

Bob Stanneveld22-Jul-03 3:01

Bob Stanneveld

22-Jul-03 3:01

Do you need to transfer the value or the variable?

if you want to transfer the value, a simple solution can be:

<br />
double GetYourDoubleVar() {return m_dYourdoubleVar;}<br />

if you want to transfer the variable and that only one dialog can use is do:

<br />
BOOL GetYourDoubleVar(double* d)<br />
{<br />
    if(m_pdYourDouble == NULL)<br />
        return FALSE;<br />
    // else<br />
    d = m_pdYourDouble;<br />
    m_pdYourDouble = NULL; // remode this line if you want both dialogs to access the double<br />
    return TRUE;<br />
}<br />

hope this helps Smile | :)

A student knows little about a lot.
A professor knows a lot about little.
I know everything about nothing.