C / C++ / MFC Discussion Boards

Re: Error notification in Event Viewer

Naveen14-Jun-06 0:51

Naveen

14-Jun-06 0:51

will u plz mail me?

nave

Re: Error notification in Event Viewer

XalanXalan14-Jun-06 0:54

XalanXalan

14-Jun-06 0:54

am too in NeST... i can c u wearing a grey shirt !!!

Re: Error notification in Event Viewer

XalanXalan14-Jun-06 1:10

XalanXalan

14-Jun-06 1:10

hello naveen, rnt u wearing a grey shirt or am i mistaken? plz reply.

Re: Error notification in Event Viewer

Naveen14-Jun-06 1:18

Naveen

14-Jun-06 1:18

tell me who r u?

nave

Re: Error notification in Event Viewer

Nibu babu thomas14-Jun-06 1:32

Nibu babu thomas

14-Jun-06 1:32

Naveen R wrote:
tell me who r u?

This world is real strange... Laugh | :laugh:

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: Error notification in Event Viewer

Naveen14-Jun-06 1:34

Naveen

14-Jun-06 1:34

But ur not a stranger for me Smile | :)

nave

Re: Error notification in Event Viewer

Nibu babu thomas14-Jun-06 1:35

Nibu babu thomas

14-Jun-06 1:35

But who is he any guess!!

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: Error notification in Event Viewer

Naveen14-Jun-06 1:59

Naveen

14-Jun-06 1:59

nop

nave

Mixed Language C++,Fortran

Yasir Elmahi13-Jun-06 23:43

Yasir Elmahi

13-Jun-06 23:43

When I compile a SUBROUTINE writen in fortran and link it to C++, a Message like this emerge out ": error LNK2001: unresolved external symbol _PEMV1@44"
and when I test the moule PEMV1.OBJ I found this text "_PEMV1@46".
the number of arguments to the subroutine are 10.

please could you tel me the source of this error?

mech:Yasir

Re: Mixed Language C++,Fortran

Viorel.14-Jun-06 0:10

Viorel.

14-Jun-06 0:10

The value after '@' stands for the size of parameters passed to PEMV1 subroutine. Since the value required by C++ linker differs from the effective value found in OBJ, it seems that the definition of the function in C++ and FORTRAN differs. You should compare not only the number of parameters, but their sizes too. You should investigate how FORTRAN’s data types are represented in C++. For instance, integer type can be represented by int, long and others. Try to change some of the types in C++ declaration of the function.

Re: Mixed Language C++,Fortran

John R. Shaw14-Jun-06 1:31

John R. Shaw

14-Jun-06 1:31

If you are using VC6 then look up "Mixed-language programming Topics" or "C calls to Fortran". Which basically means you may need to write a C wrapper in your program to call the Fortran code and then have the C++ code call the C wrapper. In Visual .NET I am not sure, but I do know that it is supported. I just do not know how to find it at the moment, as the information is harder to find in that help system.

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

windows directory dialog

iLL eFFect13-Jun-06 23:25

iLL eFFect

13-Jun-06 23:25

I am trying to get a directory using using one of the shell function i.e. SHBrowseForFolder. Here is my code snippet:

LPBROWSEINFOW dir;<br />
LPWSTR DisplayName;<br />
int iImage;<br />
dir->hwndOwner = NULL;<br />
dir->pidlRoot = NULL;<br />
dir->pszDisplayName = DisplayName;<br />
dir->lpszTitle = L"Open folder";<br />
dir->ulFlags = BIF_NONEWFOLDERBUTTON|BIF_RETURNONLYFSDIRS;<br />
dir->lpfn = NULL;<br />
dir->lParam = NULL;<br />
dir->iImage = NULL;<br />
SHBrowseForFolder(dir);

But as soon as I select a directory and press OK it crashes. Is there anything I am missing. Please help.

Re: windows directory dialog

Cedric Moonen13-Jun-06 23:31

Cedric Moonen

13-Jun-06 23:31

iLL eFFect wrote:
LPBROWSEINFOW dir;

Your pointer is not initialized so it points to invalid memory address. Instead of using a pointer, use the structure:

BROWSEINFO dir;
dir.hwndOwner = NULL;
...
...
...

SHBrowseForFolder(&dir);

Cédric Moonen
Software developer

Charting control

Re: windows directory dialog

iLL eFFect13-Jun-06 23:38

iLL eFFect

13-Jun-06 23:38

Ok it worked some. But crashed at some other place.
Is there something that i have to do?

Re: windows directory dialog

Cedric Moonen13-Jun-06 23:46

Cedric Moonen

13-Jun-06 23:46

iLL eFFect wrote:
Is there something that i have to do?

Yes: use your debugger. It will help you to track the problem.

Cédric Moonen
Software developer

Charting control

Re: windows directory dialog

iLL eFFect14-Jun-06 0:04

iLL eFFect

14-Jun-06 0:04

i cant even use the debugger... obviously that the first thing any developer will do.... the reason is that it is failing in gs_report.c

#if defined (_CRTBLD) && !defined (_SYSCRT)<br />
    DebuggerWasPresent = IsDebuggerPresent();<br />
    _CRT_DEBUGGER_HOOK(_CRT_DEBUGGER_GSFAILURE);<br />
#endif  /* defined (_CRTBLD) && !defined (_SYSCRT) */

and there is no traceable path backwards.

-- modified at 6:06 Wednesday 14th June, 2006

Re: windows directory dialog

Blake Miller14-Jun-06 12:31

Blake Miller

14-Jun-06 12:31

The display name of the object selected is returned in the buffer pointed to by the pszDisplayName member of the BROWSEINFO parameter structure.

pszDisplayName
Address of a buffer to receive the display name of the folder selected by the user. The size of this buffer is assumed to be MAX_PATH characters.

D'Oh! | :doh:

BROWSEINFOW dir;
WCHAR wcDisplayName[MAX_PATH];

...
dir.pszDisplayName = DisplayName;
...

I've seen better runs in my shorts! - Patches O'Houlihan

Re: windows directory dialog

iLL eFFect14-Jun-06 17:56

iLL eFFect

14-Jun-06 17:56

Thanks for the help. it did work.

function with variable param

blue_rabbit13-Jun-06 23:22

blue_rabbit

13-Jun-06 23:22

Hey, i have a trouble for all. That is: For example: I want to write a function that display a messagebox with many param that i want. It should like this (like sprintf())
ms(HWND hwd,char *control_string,...){
static char *c[1000];
sprintf(c,control_string,???);
MessageBox(hwd,c,"ms",0);
};

Understand, but i don't know what ??? is ?.

If i have this function then i can call this function very useful like this:
ms(0,"%s%i%s",
"Untill now, I posted: ",
10000000000000,
" question!");

Is it useful?

Re: function with variable param

Viorel.13-Jun-06 23:39

Viorel.

13-Jun-06 23:39

You have to use va_arg, va_end and va_start macros. Try this:

#include <stdarg.h>
// ...
void ms( HWND hwd, const char * control_string, ...)
{
    va_list argptr;
    va_start(argptr, control_string);
    char c[1000];
    _vsnprintf(c, 1000, control_string, argptr);
    MessageBox(hwd, c, "ms", 0);
    va_end(argptr);
};

Hope it helps.

Re: function with variable param

Serge A. Zhirko13-Jun-06 23:46

Serge A. Zhirko

13-Jun-06 23:46

Try use this lines Wink | ;)

:

int EnhMessageBox(HWND hWnd, int mbFlags, LPCSTR pCaption, LPCSTR pTextFormat, ...)
{
va_list args;
va_start(args, pTextFormat);
int bufSize;
char pBuffer[MAX_PATH*4] = "\0";
bufSize = vsprintf(pBuffer, pTextFormat, args);
va_end(args);
return MessageBox(hWnd, pBuffer, pCaption, mbFlags);
}

Tantum possumus, quantum scimus.

Re: function with variable param

blue_rabbit13-Jun-06 23:51

blue_rabbit

13-Jun-06 23:51