Re: display Ω sign problem.. - C / C++ / MFC Discussion Boards

«_Superman_»29-Jan-09 20:52

29-Jan-09 20:52

To make the project Unicode enabled, navigate to Project->Settings->General and make the Character Set value as Use Unicode Character Set.

And then change your code to -

CString str;
str.Format(L"%c", 0x3A9);
MessageBox(str);

«_Superman_»

modified on Friday, January 30, 2009 2:58 AM

Re: display Ω sign problem..

SandipG 29-Jan-09 22:16

SandipG

29-Jan-09 22:16

«_Superman_» wrote:
str.Format(L"%c", 0x3A9);

Read this thread..Displaying Symbol issue[^]

Big Grin | :-D

I think toxcct is not around today Big Grin | :-D

Regards,
Sandip.

Re: display Ω sign problem..

CPallini29-Jan-09 22:42

CPallini

29-Jan-09 22:42

SandipG wrote:
I think toxcct is not around today

...thankfully...[^]

Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: display Ω sign problem..

toxcct30-Jan-09 1:53

toxcct

30-Jan-09 1:53

thanksfully, I had already given a working piece of code, which would have worked no matter unicode is enabled or not, and the OP would not be annoyed with his main :p

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Re: display Ω sign problem..

CPallini30-Jan-09 2:15

CPallini

30-Jan-09 2:15

Your code doesn't compile, as it stands: you should at least include a pair of header files Poke tongue | ;-P

Re: display Ω sign problem..

toxcct30-Jan-09 2:16

toxcct

30-Jan-09 2:16

obviously, but you're not trying to go on the road with me, so why should I argue on this anymore ?

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Re: display Ω sign problem..

CPallini30-Jan-09 2:34

CPallini

30-Jan-09 2:34

Don't be upset. I was just kidding. Wink | ;)

toxcct wrote:
but you're not trying to go on the road with me

I miei amici ti hanno dato la mano,
li accompagno, il loro viaggio porta un po' più lontano
(F. De André )

(cheap translation: 'my friends said goodbye to you, I'm going to travel with them since their destination is further than yours')
Big Grin | :-D

Re: display Ω sign problem..

toxcct30-Jan-09 2:43

toxcct

30-Jan-09 2:43

CPallini wrote:
Don't be upset. I was just kidding

CPallini wrote:
'my friends said goodbye to you, I'm going to travel with them since their destination is further than yours'

so why should I take this ?

OT:
Carlo, sincerely, I have to tell you that I don't like how things have gone between us. I'm really sorry if I was too harsh and if you felt attacked last time we argued of this topic.
The thing is, I really trust that we, MVP, are not only there to give the first answer, but the best. When someone is asking for help, I'm doing my best to understand beyond the question what the OP is trying to do. That's why I don't automatically give a solution that would work, but which I think is not optimal.
I think you can understand this.
Sorry again for everything.

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Re: display Ω sign problem..

CPallini30-Jan-09 3:05

CPallini

30-Jan-09 3:05

toxcct wrote:
OT:
Carlo, sincerely, I have to tell you that I don't like how things have gone between us. I'm really sorry if I was too harsh and if you felt attacked last time we argued of this topic.
The thing is, I really trust that we, MVP, are not only there to give the first answer, but the best. When someone is asking for help, I'm doing my best to understand beyond the question what the OP is trying to do. That's why I don't automatically give a solution that would work, but which I think is not optimal.
I think you can understand this.
Sorry again for everything.

Don't worry, pal. I think anyone helps as he can or wish (this is possibly the 'philosophical' distance between us). I'm sorry if my humour was silly (as it probably was, I just can't resist).
The OP question shows that indeed you were right 'the last time'.
Rose | [Rose]

Re: display Ω sign problem..

toxcct30-Jan-09 1:51

toxcct

30-Jan-09 1:51

I am, but tired of repeating myself again and again...

he should use _tmain(), CStringW and MessageBoxW() and no matter about the compiler config, but I believe you don't think the same, right ?

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modified on Friday, January 30, 2009 8:08 AM

Re: display Ω sign problem..

toxcct30-Jan-09 2:07

toxcct

30-Jan-09 2:07

«_Superman_» wrote:
str.Format(L"%c", 0x3A9);

this code is not very well designed, because it would not compile without UNICODE defined.

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Re: display Ω sign problem..

«_Superman_»30-Jan-09 2:44

«_Superman_»

30-Jan-09 2:44

You're right. It would not compile without UNICODE defined.
Now why would you ever not want UNICODE defined?

«_Superman_»

Re: display Ω sign problem..

toxcct30-Jan-09 2:48

toxcct

30-Jan-09 2:48

«_Superman_» wrote:
Now why would you ever not want UNICODE defined?

well, why not ? lol
seriously, I can't think of a good reason right now, but if it were never useful, why would this compilation mode still exist ?!

anyway, you can never predict what the others will do, so writing a "compiling-at-anytime" code is still prefered... Wink | ;)

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Re: display Ω sign problem..

«_Superman_»30-Jan-09 2:55

«_Superman_»

30-Jan-09 2:55

Initially I only used ASCII character sets.
A little later I started using the macros (_T, _tcs etc.) with the realization that people could compile this with and without UNICODE defined.

That went on for some years. But I never heard of anyone not defining UNICODE.

So now I only use L"" and the _w versions for the functions.

So probably the terminator will not have the option to not define UNICODE Smile | :)

Just as it is in Windows CE.

«_Superman_»

Re: display Ω sign problem..

toxcct30-Jan-09 2:04

toxcct

30-Jan-09 2:04

Let me try to make the things clear to you (obviously, it is not).

you want the character Omega( Ω ), which is a Unicode character. So if you want to store it in a string, you must allocate a Unicode String.
To do this, you are not obliged to have your whole project building in Unicode (with UNICODE and _UNICODE macros defined).

If you want to have a code that is dependant of the compilation mode (that mean, a code which you don't need to change anything to switch from Unicode to Ansi Build and vice versa), then you should use Generic Text Mappings (_T() macro, and such).
Using CString, _T() and MessageBox() is good most of the time, but here, this is not what you'd want exactly.

As you need a Unicode String, you have to use CStringW, and a literal string written with a prepended L (L"\x03A9").
And as MessageBox() gets a CString (and not a CStringW), you have to adapt the call by using MessageBoxW() instead.

<font color="blue">void</font> main(<font color="blue">void</font>) {    <font color="green">//or _tmain()</font>
    CStringW str = L<font color="gray">"\x03A9"</font>;
    MessageBoxW(str);
}

Is that much clear for you now ?

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Re: display Ω sign problem..

shaina223130-Jan-09 16:44

shaina2231

30-Jan-09 16:44

using code

CStringW str=L"\x0349";
MessageBoxW(str);

complier Gives error that CStringW is undeclared identifier.

Re: display Ω sign problem..

toxcct31-Jan-09 0:55

toxcct

31-Jan-09 0:55

you have to include the correct headers (and make sure you're within a MFC Project)

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How to add more than one Gif Images in MFC ActiveX Control?

ursbala29-Jan-09 19:44

ursbala

29-Jan-09 19:44

Hi...
I am designing a Switch Board Panel using MFC ActiveX Control , in that I want
to add more number of Switch like Gif images .

I am able to add One Particular Gif image more number of times but I actually
want to add different Gif images to that ActiveX Controls......

So Please give me a solution.....

Regards,
Bala

Problem with NtopenFile Api in native application

Member 342050929-Jan-09 19:32

Member 3420509

29-Jan-09 19:32

I created one file suppose "abc.txt". I denied all access to all the users and groups for that file. (I did it by going to Security tab of property dialog of that file.). When I programmatically try to open this file by using API NtOpenFile() with access mask READ_CONTROL in user mode it succeeds. In this case I am opening the file in the user context who is creator owner of that file.

When I try to open the file in the context of other user who is not creator of that file NtOpenFile() fails with error "Access Denied". It may fails due to that user doesn’t have permissions.

Now when I try to open same file in native mode, NtOpenFile() fails with error "Access Denied". What will be the reason? How I can access the file having all permissions denied to all users in native mode?

Can anybody tell who is the user in native mode? Is it System?

Re: Problem with NtopenFile Api in native application

Iain Clarke, Warrior Programmer30-Jan-09 0:13

Iain Clarke, Warrior Programmer

30-Jan-09 0:13

I'm a little confused by the question - the user will be the same one as started the program running, whichever mode you're in.

If your native code is running under your used credentials, it will have your access rights. And as you've set it to "all permissions denied to all users", then not many people can look...

I may have misunderstood, because it looms like you already answered your own question.

Services run under a different user, and drivers run in a different security context again, but that's not what you describe (or what I read!)

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

Re: Problem with NtopenFile Api in native application

Stuart Dootson30-Jan-09 3:46

Stuart Dootson

30-Jan-09 3:46

He means this sort of native mode[^] - i.e. applications that run before windows starts.

Re: Problem with NtopenFile Api in native application

Iain Clarke, Warrior Programmer30-Jan-09 8:54

Iain Clarke, Warrior Programmer

30-Jan-09 8:54

D'oh - I knew that...

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

ACE framework

hrishiS29-Jan-09 19:28

hrishiS

29-Jan-09 19:28

Hi everyone,
I am trying to implement message Queue using ACE framework. Trying to learn that concept from "C++ Network Programming, Volume 2: Systematic Reuse with ACE and Frameworks" book. But not getting head and tail of it.
Could anyone Please give me the important functions/class that will be enough to implement msg queue.

Thank you in advance

I am a learner Always

Re: ACE framework

Cosmic Egg30-Jan-09 10:01

Cosmic Egg

30-Jan-09 10:01

See example
http://www.huihoo.org/ace_tao/ACE-5.2+TAO-1.2/ACE_wrappers/docs/tutorials/Chap_7/ex01.html[^]

Problem with DeviceIoControl()

john563229-Jan-09 19:13

john5632

29-Jan-09 19:13

Hi All,

I am using DeviceIoControl() with control code FSCTL_GET_VOLUME_BITMAP to get the Bitmap of file system.

But the funtion is returning FALSE and GetLastError() is 1 (Incorrect function).

What might be the problem?

code is here:

STARTING_LCN_INPUT_BUFFER StartingLCN;
		VOLUME_BITMAP_BUFFER *Bitmap = NULL;
		ULONGLONG BitmapSize;
		DWORD BytesReturned;
		BOOL Result;

		StartingLCN.StartingLcn.QuadPart = 0;
		// Allocate buffer
		// Call FSCTL_GET_VOLUME_BITMAP once with a very small buffer
		// This will leave the total number of clusters in Bitmap->BitmapSize and we can
		// then correctly allocate based off that
		// I suppose this won't work if your drive has only 40 clusters on it or so :)
		BitmapSize = sizeof (VOLUME_BITMAP_BUFFER)*512;// + 4;
		Bitmap = (VOLUME_BITMAP_BUFFER *) malloc (BitmapSize);

		Result = DeviceIoControl
			(
			hHandle,
			FSCTL_GET_VOLUME_BITMAP,
			&StartingLCN,
			sizeof (StartingLCN),
			Bitmap,
			BitmapSize,
			&BytesReturned,
			NULL
			);

		int nError=GetLastError();
		// Bad result?
		if (Result == FALSE  &&  GetLastError () != ERROR_MORE_DATA)
		{
			//wprintf ("\nDeviceIoControl returned false, GetLastError() was not ERROR_MORE_DATA\n");
			free (Bitmap);
			return FALSE;
		}

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