Article View: comp.windows.ms.programmer
Article #2673HELP! Calling fopen() in DLL
From: dxg
Date: Wed, 15 May 1991 14:14
Date: Wed, 15 May 1991 14:14
48 lines
1730 bytes
1730 bytes
First some info: I am using MS-C 6.0a and MS-C 3.0a.
I am calling a function from a .exe that is in a DLL. This
function does an fopen() and then returns a FILE *. Within the DLL
I am able to fprintf() to the file, but when I try to call
fprintf() from my .exe it fails, with the following pop up box
in CodeView: Trap 13 (0DH) - General Protection Fault
Am I doing something wrong or is impossible to call fopen() from within
a DLL and return the FILE * to the exe?
basic function in DLL:
FILE *my_fopen( char *psFileName, char *psMode )
{
FILE *pFile;
pFile = fopen( psFileName, psMode );
if( pFile != NULL )
fprintf( pFile, "\n This works in the DLL" );
return( pFile );
}
basic function in .exe called from WinMain():
int my_func()
{
FILE *pFile;
pFile = my_fopen( "file.tmp", "w" );
if( pFile != NULL )
{
fprintf( pFile, "\n This does not work!, get CVW pop up box!" );
fclose( pFile );
}
}
The examples above may have syntax errors, but they should help
your understanding of my problem.
I do not get the chance to read news that often, so please mail me
your responses.
Many many thanks in advance.
--
Dean Grammas..............................................dxg@cai.com
"All I ask is a chance to prove that money can't make me happy."
.....................................................................
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!rpi!uupsi!cai.com!dxg From: dxg@cai.com Newsgroups: comp.windows.ms.programmer Subject: HELP! Calling fopen() in DLL Message-ID: <394.28314261@cai.com> Date: 15 May 91 14:14:57 GMT Organization: Computer Associates International Lines: 48