Confused in choosing a declaration over other - C / C++ / MFC Discussion Boards

Anuj Sharma7-Jun-09 22:35

7-Jun-09 22:35

Hello,

can anyone help me how can i get a Bitmap* of the drawing done on my view currently. I have CDC* of my current view i want to get Bitmap* of Whole drawing done on the CDC* of my current view

thnx !!

Re: Get Bitmap* CBitmap* of current view

CPallini7-Jun-09 23:24

CPallini

7-Jun-09 23:24

I suppose this article [^] maybe useful.
Smile | :)

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Re: Get Bitmap* CBitmap* of current view

Anuj Sharma8-Jun-09 0:33

Anuj Sharma

8-Jun-09 0:33

thnx it helped !!!

Re: Get Bitmap* CBitmap* of current view

CPallini8-Jun-09 0:34

CPallini

8-Jun-09 0:34

You are welcome.
Smile | :)

How to open a document using cpp

Yossi Malka7-Jun-09 22:29

Yossi Malka

7-Jun-09 22:29

I have to open a given document, without calling the application which opens it.
Semiliar to double clicking a document which opens it with the attached application (but without realy double click, just call some windows API for open document...)

Thanks

Yossi Malka

Re: How to open a document using cpp

Cedric Moonen7-Jun-09 22:32

Cedric Moonen

7-Jun-09 22:32

Take a look at ShellExecute[^]

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: How to open a document using cpp

Yossi Malka7-Jun-09 23:43

Yossi Malka

7-Jun-09 23:43

Perfect solution, Thanks.

Yossi Malka

Confused in choosing a declaration over other

ComplexLifeForm7-Jun-09 22:19

ComplexLifeForm

7-Jun-09 22:19

Hi,

I am confused regarding choosing one declaration from a set of two. I could not decided which one should be preferred over other and why it should be preferred. Please see the declarations below and let me know out of (I) and (II) which declaration is more preferred and why.

(I)
#if defined (UNICODE) && defined (_UNICODE)
typedef std::wstring _tstring;
#else
typedef std::string _tstring;
#endif

(II)
#if defined (UNICODE) && defined (_UNICODE)
#define _tstring std::wstring
#else
typedef _tstring std::string;
#endif

Thanks and Regards
Smile | :)

Re: Confused in choosing a declaration over other

CPallini7-Jun-09 23:19

CPallini

7-Jun-09 23:19

I would choose typedef. You may google a bit [^] to find comparisons.
Smile | :)

Re: Confused in choosing a declaration over other

Stuart Dootson8-Jun-09 2:41

Stuart Dootson

8-Jun-09 2:41

Use the

typedef

. At least typedefs are part of the language and can be constrained by the namespacing mechanisms the language has (namespace, class, struct etc).

#defines, on the other hand, have the effect of performing a global search and replace over your code, which can causes horrors to occur. The C++ FAQs say it[^] quite well.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Difference between CWaitCursor SetCursor(LoadCursor(NULL, IDC_WAIT));

ptr_Electron7-Jun-09 20:49

ptr_Electron

7-Jun-09 20:49

What is the difference between

CWaitCursor wait;

and

SetCursor(LoadCursor(NULL, IDC_WAIT));

and at what situation/ advantage and disadvantage between them

Re: Difference between CWaitCursor SetCursor(LoadCursor(NULL, IDC_WAIT));

«_Superman_»7-Jun-09 20:56

«_Superman_»

7-Jun-09 20:56

CWaitCursor belongs to the MFC library.
The SetCursor that you did was Windows API calls.

MFC also has CCmdTarget::BeginWaitCursor and CCmdTarget::EndWaitCursor methods to do the same.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Difference between CWaitCursor SetCursor(LoadCursor(NULL, IDC_WAIT));

ptr_Electron7-Jun-09 23:21

ptr_Electron

7-Jun-09 23:21

I used

CWaitCursor wait;

it is working for all the dialogs but it is not working for one sigle dialog what would be the resson, Please advice

Re: Difference between CWaitCursor SetCursor(LoadCursor(NULL, IDC_WAIT));

CPallini7-Jun-09 21:03

CPallini

7-Jun-09 21:03

I would recommend the documentation [^], [^].
Smile | :)

Re: Difference between CWaitCursor SetCursor(LoadCursor(NULL, IDC_WAIT));

ptr_Electron7-Jun-09 22:56

ptr_Electron

7-Jun-09 22:56

I used

CWaitCursor wait;

it is working for all the dialogs but it is not working for one sigle dialog what would be the resson, Please advice

Re: Difference between CWaitCursor SetCursor(LoadCursor(NULL, IDC_WAIT));

Chandrasekharan P8-Jun-09 0:00

Chandrasekharan P

8-Jun-09 0:00

if its working for all the other dialogs then why is it not working for one single window?? and what advice do you expect? how do we know what implementation have you done?

MapViewofFile fails because memory not being continuous.

krishnan.s7-Jun-09 20:38

krishnan.s

7-Jun-09 20:38

Hi,

The MapViewOfFile function fails when 1gb of memory is mapped , it seems the memory is not continuous which is causing the problem.

Is there any way to overcome this problem.

Thanks

Re: MapViewofFile fails because memory not being continuous.

«_Superman_»7-Jun-09 20:59

«_Superman_»

7-Jun-09 20:59

You have to map only part of the file at a time. To load more of the file unmap the current view and map the new view.

This is an excerpt from MSDN -

For files that are larger than the address space, you can only map a small portion of the file data at one time. When the first view is complete, you can unmap it and map a new view.

To obtain the size of a view, use the VirtualQuery function.

«_Superman_»
I love work. It gives me something to do between weekends.

NetShareAdd with user permission

Nyil7-Jun-09 20:13

Nyil

7-Jun-09 20:13

I have a list of domains users( ie domain\user1, domain\user2, etc.. ), and I want to share a folder for this users only.

i am tried with NetShareAdd(). and succeed to share with everyone Read permission. But I do not want to give everyone ,really want to specify the users

This is the Code block i have tried.

#define MAXLEN 256
NET_API_STATUS res;
SHARE_INFO_502 p;
DWORD parm_err = 0;

char *dir="TESTSHARE";
wchar_t  shareName[MAXLEN];
mbstowcs( shareName, dir, MAXLEN );

char* remark = "TESTSHARE to test NetShareAdd";
wchar_t  ShareRemark[MAXLEN];
mbstowcs( ShareRemark, remark, MAXLEN );

p.shi502_passwd = NULL;
p.shi502_permissions = ACCESS_READ;
p.shi502_netname = LPSTR(shareName);
p.shi502_type = STYPE_DISKTREE; // disk drive
p.shi502_remark = LPSTR(ShareRemark);
p.shi502_max_uses = 4;
p.shi502_current_uses = 0;

res = NetShareAdd(NULL, 502, (LPBYTE) &p, &parm_err);

can Anyone one help me..
Thanks in advance

Making GUI for Capicom Certificates

UserNameless7-Jun-09 20:05

UserNameless

7-Jun-09 20:05

Hi I need help creating a user interface which would display all the certificates stored in MyStore. I want to display certificate information such as Issued by, issued to, and expiry date in different columns and when i click a specific certificate, the certificate should open up. I was able to display all those information in the console but I don't know how to go on about doing this in a GUI. Help would be most appreciated Sigh | :sigh:

Re: Making GUI for Capicom Certificates

Garth J Lancaster7-Jun-09 20:43

Garth J Lancaster

7-Jun-09 20:43

why dont you look at using a dialog and a listbox (ie, for columns) ?

there's plenty of examples of using a listbox

'g'

Re: Making GUI for Capicom Certificates

UserNameless7-Jun-09 20:49

UserNameless

7-Jun-09 20:49

will do. thanks Smile | :)

Memory Alignment - 32 bit

Richard Andrew x647-Jun-09 17:16

Richard Andrew x64

7-Jun-09 17:16

The 32-bit "Interlocked...." functions say that their parameters must be aligned on "a 32-bit boundary," otherwise they behave unpredictably.

Do I need to worry about this in the ordinary case of declaring member variables in my C++ classes with VS 2008?

Re: Memory Alignment - 32 bit

Joe Woodbury7-Jun-09 17:25

Joe Woodbury

7-Jun-09 17:25

If you don't use #pragma pack and change the alignment to less than 4, you don't need to worry.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: Memory Alignment - 32 bit

Richard Andrew x647-Jun-09 19:33

Richard Andrew x64

7-Jun-09 19:33

Thanks! I was getting worried there for a while. Thumbs Up | :thumbsup:

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