C / C++ / MFC

linking error with "afxdao.h"

3-Aug-04 3:48

The preferred method is to use CreateProcess() or ShellExecute(). The system() function is a hold-over from Unix.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Makefile problems

mcsherry2-Aug-04 23:40

mcsherry

2-Aug-04 23:40

Hi,

I've got a mixed source code project (ADA, C and C++) which I need to compile using a makefile (linking will be done at the ada side). For the C++ and C code I'm using the Visual C++ 6.0 compiler and I run vcvars32 beforehand to ensure that the compiler options are setup. However, the problem I'm having is that when I #include any 'system' header files, e.g. fstream.h, stdio, etc... I get an error saying it can't find the specified file. I've tried including a hardcoded path in my make file to these files but I still get the same error! Confused | :confused:

Does anyone know how I can get my makefile to (preferably automatically) pick up these files?

Also sometimes when I reboot my machine the makefile tries to use the g++3 compiler instead of the studio one, what might be causing this? (I'm using VC 6.0 compiler in other parts of the project so I'm trying to keep the number of compilers, languages and libraries down to a minimum)

many thanks,

si_692-Aug-04 23:19

si_69

2-Aug-04 23:19

Hi all

i need to include the library "afxdao.h" with
my app, but when i compile i get the following error

has any one come across this before ? Confused | :confused:

c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\dbdaoint.h(109): error C2011: 'LockTypeEnum' : 'enum' type redefinition
c:\MyApp\Debug\msado15.tlh(228) : see declaration of 'LockTypeEnum'

Re: linking error with "afxdao.h"

David Crow3-Aug-04 3:54

Re: linking error with "afxdao.h"

3-Aug-04 3:54

First, the linker does not care about .h files. Those files are handled by the preprocessor.

si_69 wrote:
i need to include the library "afxdao.h"...

This is a header file, not a library.

si_69 wrote:
c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\dbdaoint.h(109): error C2011: 'LockTypeEnum' : 'enum' type redefinition
c:\MyApp\Debug\msado15.tlh(228) : see declaration of 'LockTypeEnum'

The error is telling you that more than once instance of LockTypeEnum has been found. If you remove the inclusion of afxdao.h, does the error go away, or get replaced with a different error?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

si_693-Aug-04 3:58

si_69

3-Aug-04 3:58

DavidCrow wrote:
If you remove the inclusion of afxdao.h, does the error go away, or get replaced with a different error?

yes, the error goes away if i remove the afxdao.h

but i require that header file

i found using

#import "C:\program files\common files\system\ado\msado15.dll" no_namespace rename( "EOF", "adoEOF" ) rename ("LockTypeEnum","newLockTypeEnum")

has solved my problem

thanks anyway
si

Re: linking error with "afxdao.h"

David Crow3-Aug-04 4:04

How to show a dialog in the taskbar?

3-Aug-04 4:04

si_69 wrote:
i found using

#import "C:\program files\common files\system\ado\msado15.dll" no_namespace rename( "EOF", "adoEOF" ) rename ("LockTypeEnum","newLockTypeEnum")

has solved my problem

It may very well have solved it, but without knowing more about the application and the problem, it may also have just masked the real problem.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

GiHubb2-Aug-04 23:12

GiHubb

2-Aug-04 23:12

My app creates a CDialog which is displayed in the taskbar. Then I hide this dialog (with ShowWindow(SW_HIDE)) and create a new CDialog. However since I hid the 1st dialog, the taskbar window is also not shown and the new CDialog doesn't display a new taskbar window. What am I doing wrong here? - how can the new dialog display a taskbar window?

how to fing windows system directory

Anonymous2-Aug-04 22:42

2-Aug-04 22:42

in my application i need to find the windows system directory(ie. say C:\WINNT\system32) at run time. how do i do so? any APIs?

peterchen2-Aug-04 23:02

2-Aug-04 23:02

TCHAR buffer[_MAX_PATH+1] = { 0 };
BOOL ok = SHGetSpecialFolderPath(myHwnd, buffer, CSIDL_SYSTEM, false);

we are here to help each other get through this thing, whatever it is Vonnegut jr.

sighist || Agile Programming | doxygen

Anonymous2-Aug-04 23:30

2-Aug-04 23:30

SHGetSpecialFolderPath not working......

User 66583-Aug-04 1:46

User 6658

3-Aug-04 1:46

GetSystemDirectory

sometimes it's soooo easy.

modified 12-Sep-18 21:01pm.

Anonymous2-Aug-04 23:59

2-Aug-04 23:59

CSDIL_SYSTEM does not exist.
i have checked the other option, none gives the systen folder

Michael P Butler3-Aug-04 0:49

Michael P Butler

3-Aug-04 0:49

Anonymous wrote:
CSDIL_SYSTEM does not exist.
i have checked the other option, none gives the systen folder

CSIDL_SYSTEM is the correct value. It is defined in shlobj.h

You might also try GetSystemDirectory but I'm not sure if that returns System or System32.

Michael

CP Blog [^]

peterchen3-Aug-04 2:06

3-Aug-04 2:06

It's CSIDL_SYSTEM, and it does exist with the current platform SDK.

If you're running VC6 "out of the box", you might have to use GetSystemDirectory()

we are here to help each other get through this thing, whatever it is Vonnegut jr.

sighist || Agile Programming | doxygen

Anonymous3-Aug-04 1:44

3-Aug-04 1:44

#include <strstrea.h>

char szDir[128];
ostrstream strmDir(szDir, sizeof(szDir));

strmDir << getenv("SystemRoot");
strmDir << "\\System32" << ends;

You can string the insertions out in one line. I broke them up into seperate lines because of the horixzontal linitation of this window.

The size of 128 is arbitrary. You could use "MAX_PATH" or "_MAX_PATH" depending on other includes in your program

David Crow3-Aug-04 3:57

3-Aug-04 3:57

Anonymous wrote:
strmDir << getenv("SystemRoot");

Not only does this rely upon environment variables, which I consider a bad practice, it does not include "System" or "System32" in the returned value.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

parths3-Aug-04 1:45

parths

3-Aug-04 1:45

GetSystemDirectory[^]?

"It was when I found out I could make mistakes that I knew I was on to something."
-Ornette Coleman

"Philosophy is a study that lets us be unhappy more intelligently."
-Anon.

Anonymous3-Aug-04 1:46

Delayed Single Instance Creation

3-Aug-04 1:46

The include in the previous response should have been strstrea.h

scrolling up

V.2-Aug-04 22:41

2-Aug-04 22:41

Hi,

I have a MSHFlexgrid with a list of names. when you press eg. 's' the first name that starts with an 's' is highlighted and the list scrolls down. If I then press 'a' however, the name is highlighted, but the view doesn't scroll up.
I've tried about every function with "scroll" in it( Dead | X|

) and even refreshing and 'scrolling' down from the start, but nope...

anybody got some clue on how to solve this?
(in meantime I do keep searching Blush | :O

)

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

peterchen2-Aug-04 22:34

Re: Delayed Single Instance Creation

2-Aug-04 22:34

I'm looking for a generic/convenient solution to the following common pattern:

X * GetX()
{
  static X * x = NULL;
  if (x == NULL)
    x = CreateX(); // soome custom function
  return x;
}

I know hot to make it threadsafe, etc, but would love to find something "well tested", threadsafe, and convenient.

Any links?

we are here to help each other get through this thing, whatever it is Vonnegut jr.

sighist || Agile Programming | doxygen

Ravi Bhavnani3-Aug-04 1:46

Ravi Bhavnani

3-Aug-04 1:46

You could use a static CCriticalSection which you Lock() and Unlock() within the X::GetX() method. That should ensure the singleton nature of your code.

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

Re: Delayed Single Instance Creation

peterchen3-Aug-04 2:02