Re: #if - C / C++ / MFC Discussion Boards

Re: #if

toxcct22-Dec-05 23:18

toxcct

22-Dec-05 23:18

Rokiee wrote:
but how the value of "MSDOS" is obtained??

you mean, how to set SYSTEM macro with MSDOS value ?
like this :

#define SYSTEM MSDOS

otherwise, if you want to actually test for the real Operating System to know if the program is running under DOS or not, you won't be able to do this at preprocessing time.
it is only at run time you will get the OS version and to one or one action...

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Re: #if

Smith#22-Dec-05 23:40

Smith#

22-Dec-05 23:40

please refer my replies. above and below

regards,
Rookie
Installing MFC...2% complete

Re: #if [edited]

toxcct22-Dec-05 23:41

toxcct

22-Dec-05 23:41

nope, you're wrong.
please refer the original question

sorry, i thought i talked to somebody else Big Grin | :-D

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

-- modified at 6:05 Friday 23rd December, 2005

Re: #if [edited]

Eytukan23-Dec-05 0:37

Eytukan

23-Dec-05 0:37

"But your mind is very complex, very tricky. It makes simple things complicated. -- that's its work. And for centuries it has been trained for only one thing: to make things so complicated that your life becomes impossible."- Osho

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Re: #if

khan++22-Dec-05 23:35

khan++

22-Dec-05 23:35

I think you want to automatically include files according to the compiler.
Here is the macro for Turbo C++ which I think is provided by the compiler:
__MSDOS__

So you would write:

#ifdef __MSDOS__<br />
#include "msdos.h" //whatever<br />
#else<br />
#include "other.h"<br />
#endif

http://www.sm.u-bordeaux2.fr/~corsini/Pedagogie/SCM/scm/Automatic_C_Preprocessor_Definitions.html[^]

this is this.

Re: #if

Smith#22-Dec-05 23:39

Smith#

22-Dec-05 23:39

at compile time , _MSDOS_ would be true("defined") ,if its run in DOS right??

regards,
Rookie
Installing MFC...2% complete

Re: #if

toxcct22-Dec-05 23:43

toxcct

22-Dec-05 23:43

Rokiee wrote:
_MSDOS_ would be true("defined") ,if its run in DOS right??

definitely not ! Frown | :(

refer my other answers

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Re: #if

Smith#22-Dec-05 23:50

Smith#

22-Dec-05 23:50

so is it a way to talk to the compiler? the

like , #ifdef _MSDOS_ (if the system runs on DOS)
include....

??

regards,
Rookie
Installing MFC...2% complete

Re: #if

toxcct22-Dec-05 23:58

toxcct

22-Dec-05 23:58

i think either you don't undertand or you don't know what is the preprocessor.
the preprocessor creates a version of the file that is passed then to the compiler. but the compiler don't see exactly the file as you wrote it !!

lets take an example. if you have this :

#if defined(MY_MACRO)
#include "file1.h"
#else
#include "file2.h"
#endif

now, if you have MY_MACRO defined, the compiler will see :

#include "file1.h"

if not, it will see :

#include "file2.h"

but never the compiler sees the preprocessor directives.

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Re: #if

toxcct22-Dec-05 23:40

toxcct

22-Dec-05 23:40

2 things to try to demonstrate (on more time D'Oh! | :doh:

) that you're wrong :

on the link you provide, it tells that the macro is not defined by VisualC++ compiler :

__MSDOS__       Turbo C, Borland C, and DJGPP

the second thing is that, even if the compiler sets this macro, the program won't be able to determine while running, if it is launched from windows, or from a plain MS-DOS console. such a test must be done a runtime, not compile time, and even less a preprocessing time.

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Re: #if

khan++22-Dec-05 23:53

khan++

22-Dec-05 23:53

The original poster asked to include a file depending on the environment. But now it seems that he wants to know the OS at runtime. So you are right.

this is this.

Re: #if

Smith#23-Dec-05 0:06

Smith#

23-Dec-05 0:06

then whats the use of
#ifdef __GNUC__
##ifdef WIN32

regards,
Rookie
Installing MFC...2% complete

Re: #if

toxcct23-Dec-05 0:10

toxcct

23-Dec-05 0:10

i don't know for __GNUC__
but i think the WIN32 macro tells the compiler that the target of the program will be Windows 95 (or later).
now if you #define __MSDOS__ (or such a macro), even if the program is build to be run on DOS (command line), it doesn't forbid anyone to run it under Windows XP for example. isn't it what you want ?

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Re: #if

Smith#23-Dec-05 0:33

Smith#

23-Dec-05 0:33

atlast you have done the most difficult job- makeing me understand. thanks, but sorry to disturb all you people Frown | :(

regards,
Rookie
Installing MFC...2% complete

Re: #if

toxcct23-Dec-05 1:01

toxcct

23-Dec-05 1:01

no problem, it's a great pleasure when a thing that's quite hard to understand for someone, it finally understood thanks to my explanations...

cheers,
Rose | [Rose]

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Re: #if

Russell^'23-Dec-05 0:15

Russell^'

23-Dec-05 0:15

Look here
http://www.cppreference.com/preprocessor/preprocessor_if.html[^]
http://www.cppreference.com/preprocessor/define.html[^]

Merry Christmas
Have a nice code day Wink | ;)

Re: #if

Smith#23-Dec-05 0:35

Smith#

23-Dec-05 0:35

very nice examples

regards,
Rookie
Installing MFC...2% complete

GetMenu() returns NULL for Visual Studio 2003

Owner drawn22-Dec-05 22:02

Owner drawn

22-Dec-05 22:02

I am making an Application analyzer.

It involves analyzing menu structure of an application too.

For acrobat reader it doesn't return any text for a menu. I am getting the menu items correctly but no text. So tree nodes are empty. I guess it could be because it is "ownerdrawn" (not me Poke tongue | ;-P

).

But For Visual studio 2003 GetMenu returns NULL.

For Other windows it's working fine. For eg: Yahoo messenger.

Any ideas why this's happening. D'Oh! | :doh:

Happy christmas friends. May the Love of My Lord and Saviour Jesus bring forth Joy and Happiness into your life too.
<marquee direction="up" height="50" scrolldelay="1" step="1" scrollamount="1" hspace="2" vspace="2">
--Owner Drawn
--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord

Somebody help :(

Owner drawn23-Dec-05 0:21

Owner drawn

23-Dec-05 0:21

Help

Eytukan23-Dec-05 0:44

Eytukan

23-Dec-05 0:44

m_BlueBrush ?? Big Grin | :-D

, nice

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Re: GetMenu() returns NULL for Visual Studio 2003

PJ Arends23-Dec-05 10:48

PJ Arends

23-Dec-05 10:48

From MSDN[^]:

[quote]
GetMenu does not work on floating menu bars. Floating menu bars are custom controls that mimic standard menus; they are not menus. To get the handle on a floating menu bar, use the Active Accessibility APIs.
[/quote]

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

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Within you lies the power for good - Use it!

Handling Win32 Exceptions

mikobi22-Dec-05 21:57

mikobi

22-Dec-05 21:57

In my view I have an edit control. the variable associate to it is float.

If I put in characters I have an error in french " saisir le nombre" . to translate in english : "Introduise a number". And the program stop there.

I need to catch this error so that the program can't broken.

What to do ? where exactly to write codes.
I am using Visual c++ 6.0

I lear my self

Re: Handling Win32 Exceptions

ThatsAlok22-Dec-05 22:54

ThatsAlok

22-Dec-05 22:54