C / C++ / MFC Discussion Boards

neil.kuo9-Aug-09 23:00

9-Aug-09 23:00

If you'd like to show your file as a picture in explorer's thumbnail mode, maybe you can fill the 'zoomed' image data(bmp/jpg/...) in file header. Poke tongue | ;-P

Re: Windows ThumbNail

kilt11-Aug-09 6:13

kilt

11-Aug-09 6:13

Windows uses Win32 COM (Thumbnails interfaces)
You can ask on Adv. Win32 api newsgroup :
news://nntp.aioe.org/comp.os.ms-windows.programmer.win32
or
http://groups.google.com/group/comp.os.ms-windows.programmer.win32/topics?lnk=srg
for official code (MS) to display thumbnails.

How to change BSTR in Visual Basic as VC++?

lsh486love9-Aug-09 18:16

lsh486love

9-Aug-09 18:16

Hi,

Private Sub Command1_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Command1.Click

Dim barcord1 As String

barcordreader = New HANBARCORDLib.barcord

barcordreader.ReadBarcord("c:\image.raw")

barcordreader.GetBarcord1(barcord1)

Text1.Text = barcord1
End Sub
End Class

the variable, barcord1 is declared by "String".

And it is possible that a parameter of the method, "barcordreader.GetBarcord1(BSTR*)".
But I don't know how to change the code by Visual C++.

I actually made it like this :
BSTR barcord1[64]={NULL,};
barcordreader.GetBarcord1(barcord1);

but it doesn't work.
I want to get result as a type of string.
please help me.

Thanks for reading..

Re: How to change BSTR in Visual Basic as VC++?

Stuart Dootson10-Aug-09 0:39

Stuart Dootson

10-Aug-09 0:39

BSTR barcord1;
barcordreader.GetBarcord1(&barcord1);
// Do stuff with the BSTR
::SysFreeString(barcord1);

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

I want to display a Bitmap on the splitter

lan_63738369-Aug-09 17:43

lan_6373836

9-Aug-09 17:43

I use source code On the Web site(http://www.codeproject.com/script/Forums/Edit.aspx?fid=1647&floc=/Forums/1647/C-Cplusplus-MFC.aspx). What should I do?Thx,

Need help writing a few basic c programs to get through a college course...PAYING OUT THE NOSE!!!

afbmet9-Aug-09 16:37

afbmet

9-Aug-09 16:37

You name the price...will send it to your paypal immediately. Need a couple programs written...basic function program, 2 basic string programs, and 2 soon to be determined assignments along the lines of printing results I think. Pretty much need help with my homework. Should be super easy for a programmer, of which I am not. Get greedy, I have to get these in immediately, or risk failing a course thqat cost me a lot of money.

VC++ 6.0 adding a function with struct variable gives an error in .CPP file.

Vaclav_9-Aug-09 15:18

Vaclav_

9-Aug-09 15:18

Sorry for this repost but I never found the solution.
Now I need to use struct as function parameter again and I am stuck with this error again and I cannot find anything about this in WWW.
I am adding a function with struct variable (using wizard function add) typing
Function(struct*) and I am getting this:
Function ($S1) in cpp and Function(struct *) in the h file.
Of course, the compiler complains about missing definition.
Is this a known bug?

Declaring a function manually gives same results.
void Test(struct * );
shows up in VC++ editor view as
Test($S1) immediately.

Do I need to use typedef?

Thanks for reading. Any constructive help as always is appreciated.

Thanks Vaclav

Re: VC++ 6.0 adding a function with struct variable gives an error in .CPP file.

_AnsHUMAN_ 9-Aug-09 20:14

_AnsHUMAN_

9-Aug-09 20:14

What is the name of the structure and where have you defined it?

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: VC++ 6.0 adding a function with struct variable gives an error in .CPP file.

Vaclav_10-Aug-09 12:48

Vaclav_

10-Aug-09 12:48

I appears that the VC 6.0 wizard has a problem using struct as a function variable. If I add all the necessary code manually it works as expected,but in the file tab the VC editor cannot find the function definition.
It would be interesting to know if never VS have same problem.
For now call it hacked.

Here is "normal" definition / declaration I am using

Declaration
struct NewTest
     {
          int a;
     }aa,bb,*CC;

     struct TEST
     {
          int a;
     }a,b,c,*d;

     int Test(struct TEST );
     void TestOne(struct NewTest *);

Definition
int CStructTestView::Test(struct TEST   a)
{

     return 0;
}

void CStructTestView::TestOne(struct NewTest *d)
{

}

I have no clue where did this &xxx junk came from.

where to get information about shell in registry and files.

mr.dot9-Aug-09 7:52

mr.dot

9-Aug-09 7:52

Hi, guys, I'm writing simple tool for interest, like managing softwares, file association or IE history.
But when I get into this field, I find there are many information stored in files or registry. Like "index.dat" or "HKLM\SOFTWARE\Clients".
So I want to know, where I can get more information about such thing( registry about shell )?
Thanks in advance. Smile | :)

Re: where to get information about shell in registry and files.

Michael Schubert10-Aug-09 4:34

Michael Schubert

10-Aug-09 4:34

Firstly - stop cross-posting this all over the site.

Secondly - Sounds like you're trying to write some kind of spyware or worse. Actually, I'm rather sure about it. Get lost.

Re: where to get information about shell in registry and files.

mr.dot10-Aug-09 15:11

mr.dot

10-Aug-09 15:11

I don't where this should be post really, so this is my fault.
But what I want to write is just one assistant, I still got no reason to write things like you said.
In fact, I know 90% of it already from google or friends.
I just want to know where I can get official and overal topics about these.
MSDN talks some scattered.

Multiple language installation (setup)

includeh109-Aug-09 3:35

includeh10

9-Aug-09 3:35

In the moment, we have a multiple language software - including English, Chineses simple and trudition, Japanese, French, Korean and more in the future.

We used inno setup before.but it only supports english.

Now I need a unicode installation pack, user can select a language in install process.

Do you know which installation software can do this?

Thanks.

Re: Multiple language installation (setup)

«_Superman_»9-Aug-09 17:35

«_Superman_»

9-Aug-09 17:35

InstallShield[^] is the most widely used installation software.

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

Execution Speed of C++ in different circumstances!!!! [modified]

auto98178-Aug-09 11:46

auto9817

8-Aug-09 11:46

Hi everyone!!

I have a scientific C++ program which requires a good speed to run.(the program runs a lot of matrix and vector operations)

For doing that, I come across following options on the net:

1. Use of turbo C++
2. Use of Linux instead of window XP

My current system uses Dev C++ over Window XP.

Can I expect some speed increase using above options?
If so, would it be significant?

Thanks

modified on Saturday, August 8, 2009 5:55 PM

Re: Execution Speed of C++ in different circumstances!!!! [modified]

Moak8-Aug-09 12:46

Moak

8-Aug-09 12:46

auto9817 wrote:
Can I expect some speed increase using above options?
If so, would it be significant?

I did read that the Intel compiler creates "best" (here in the meaning of fastest) code on Intel processors, compared to Microsoft's VC and GCC. Never used it myself and I don't have a link to an up-to-date statistics, Wikipedia mentions something about optimizations[^].
However, design and architecture improvements can give more dramatic improvements, e.g. reduce complexity in algorithms, profile for bottlenecks, rewrite for parallel processing on CPUs with multiple cores, outsource matrix operations to GPU... to name some possibilities. Those things are outside the possibilities of a compiler (automated tool) but could be worth to check.

Turbo C++ still exists? Smile | :)

Hope it helps.

My webchat in Europe Java | [Coffee]

(in 4K)

modified on Saturday, August 8, 2009 6:52 PM

Re: Execution Speed of C++ in different circumstances!!!!

Maximilien9-Aug-09 1:47

Maximilien

9-Aug-09 1:47

I would first suggest using VS2008 compiler (which I believe you're not using) first; then
if you have the time and money, try the Intel compiler, it might be a little bit faster
in some operations, especially ones where the use of specific CPU hardware instruction codes
(SSE, ...)

If your matrix and vector operations work on large scale matrices, I would highly suggest
investing the in the Intel compiler AND the Intel MKL (math kernel library)

This signature was proudly tested on animals.

Disable esc key exit for MFC Application

swinder8-Aug-09 9:11

swinder

8-Aug-09 9:11

Hi experts,

I have an Application in MFC using single dialog window.

Problem i am facing is, it exits when i press escape key.

i want it to exit when i press "Exit" button that i made my self and also by pressing "x"(default close button provided in dialog) button on top right corner of window but not by "esc" key.

I tried emptying the implementation of "OnCancel" function. It solves the problem of "esc" key, but it also disables, exit when i press "x" button.

Please help me, it is very annoying when i accidentally press exit and window goes away.

If possible, tell me way to add, minimize button along with "x"(close) button on the top.

Regards,
Swinder....

Re: Disable esc key exit for MFC Application

Code-o-mat8-Aug-09 9:43

Code-o-mat

8-Aug-09 9:43

Add an OnSysCommand[^] handler that watches for SC_CLOSE and calls __super::OnCancel() when it hits.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

Re: Disable esc key exit for MFC Application

David Crow8-Aug-09 11:38

David Crow

8-Aug-09 11:38

See here.

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Re: Disable esc key exit for MFC Application

jon_fallon9-Aug-09 2:45

jon_fallon

9-Aug-09 2:45

David,

That FAQ answered many other questions. Thanks for its post.

Re: Disable esc key exit for MFC Application

jon_fallon9-Aug-09 2:44

jon_fallon

9-Aug-09 2:44

Also, one use use PreTranslateMessage to intercept the ESC key. Add the function to the dialog using the class wizard, then check for the ESC key.

BOOL CDxf2NastranDlg::PreTranslateMessage(MSG* pMsg) <br />
{<br />
	// TODO: Add your specialized code here and/or call the base class<br />
	// ESC key<br />
	if(pMsg->wParam == VK_ESCAPE) { return TRUE; }<br />
<br />
	return CDialog::PreTranslateMessage(pMsg);<br />
}<br />

Read Text File line be line....

spalanivel8-Aug-09 8:23

spalanivel

8-Aug-09 8:23

Hi,
I want to read Text File line by line and code follows;(with out using the << operator and char buffer)

ifstream Textfile;
Textfile.open(strFilePath,ios::in);
string value;
while(!Textfile.eof())
{
getline(Textfile,value);
}
Textfile.close();

When i am compiling the above code it throws the error as

error C3861: 'getline': identifier not found, even with argument-dependent lookup

How to rectify this error.. Any other sample Code??

reg,
Subbu

Re: Read Text File line be line....

PJ Arends8-Aug-09 9:23

PJ Arends

8-Aug-09 9:23

Did you #include <string>?

Also, basic_istream has a member getline(), maybe try using that one?

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good - Use it!

Re: Read Text File line be line....

dybs9-Aug-09 16:20

dybs

9-Aug-09 16:20

Make sure you're including a using namespace std; line as well.

Dybs

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