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I strongly recommend using boost::thread, which internally uses _beginthreadex. Personally while I've been learning about threading I've spent more time worring more about the higher level details rather than about specific API calls.
Boost::thread prevents many of the common problems - for instance it guarantees that the thread is running before the constructor finishes, as well as providing a variety of lock mechanisms and providing a general way to pass in any function with any signature.
It also provides a way to ensure that a thread will finish.
http://www.boost.org/[^]
If you can keep you head when all about you
Are losing theirs and blaming it on you;
If you can dream - and not make dreams your master;
If you can think - and not make thoughts you aim;
Yours is the Earth and everything that's in it.
Rudyard Kipling
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that depends on the question if you use CRT code in your new thread.
the only difference between _beginthreadex and CreateThread is that CRT allocated per-thread data when using _beginthreadex.
have a look at "threadex.c" for further details.
(I don't use _beginthreadex, because I don't use CRT, I've written all functions myself so I don't need CRT.)
Don't try it, just do it! 
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I am writing a plug-in, which is a DLL (not exporting MFC classes). My dll exports a function, when it is called I show the MFC dialog window. Like this (I have an application class to support mfc, created by wizard):
void my_func()
{
CMyDlg dlg;
dlg.ShowModal();
}
This works. I have a problem, when I am trying to use Frame based window. I have a SDI frame and I can show it. But when I was closing it I have an exception in CFrameWnd::OnClose(), because this function closes the document and then tries to access it. I overrided CMainFrame::OnClose(), so it solved the problem (I just hide my frame). But when the host application terminates I have an access violation at CThreadSlotData::GetThreadValue(int nSlot) function at this line:
ASSERT(m_pSlotData[nSlot].dwFlags & SLOT_USED);
Anybody knows why should this happen? Maybe my dll tries to process some message, which it shouldn't? Any suggestions? Host application calls another exproted function from my dll, before exiting, but this function is not called, so I wonder how does my dll knows about termination, before host application infroms it about it?
Thanks in advance.
Regards,
Alexander.
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Dear all Members,
Luckily, I found this site on the net. I knew you are the professonal VC programmers.Help me please.
I used MFC to make my program(related to image processing). There were some questions I would like to ask you:
1.How to display and modify the R,G,B value of a loaded image?
2.I have a 24bit bmp image.How to display the Rimage, Gimage and Bimage??(that's mean on the screen there are 4 images:RGBimage,Rimage,Gimage and Bimage).
3. How to display the R,G,and B histogram?
THank you in advance!!
Best regards,
Mr.Tran.
Mr.Tran
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You can look at following places:
http://ece.unh.edu/svpal/Users/shyrokov/index.html
it has source code available. You can see how to load image and how to display, though it does not work with 24 bit images, it could help you. It also has routins for histogram calculation.
http://www.intel.com/research/mrl/research/opencv/
Is a special library dedicated to image processing and you can find it very useful.
Also have a look at libraries like:
http://freeimage.sourceforge.net/
http://corona.sourceforge.net/
Good-luck.
Regards,
Alexander.
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I've (finally) decided to join the 20th century and switch to VC7. 
Does anyone know how to permanently (i.e. globally) turn off code outlining. I know you can R-click a source file and toggle it, but I was hoping to find a global setting. Thanks,
/ravi
My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com
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Toosl->Options->Text Editor->[Language]->Formatting
Michael
But you know when the truth is told,
That you can get what you want or you can just get old,
Your're going to kick off before you even get halfway through.
When will you realise... Vienna waits for you? - "The Stranger," Billy Joel
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ahhhhhhhhhhhhhhhhhhhh ravi
there are sooooooooo many more horrors waiting to jump u
i HATE the ide of vs.net for c++ coding
"there is no spoon"
biz stuff about me
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I can imagine...
I spent (wasted) several minutes fighting VC7's desire to tabify my windows in ways that can only be described as unholy. And why did they do away (i.e. change) Alt-F3? I've got the IDE to (sorta) resemble my old favorite, but I'm sure I'll run into more problems once I start using the thing to real work.
Oh, and an attempt to convert a VC6 DLL (that uses a lot of STL) caused it to complain that it couldn't find "iostream.h" (it should be in my #include path), and a few seconds later, crashed my W2K box. First crash in years!
/ravi
My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com
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yah
it really is a huge step forward in productivity tools
NOT!
wait til u try and find class wizard
"there is no spoon"
biz stuff about me
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NO!!!! NOT ClassWizard!!! 
What I really need to use VC7 for is CDHtmlDialog. I'm building a wizard GUI that's served up from a webserver, and need to get/put form data between the form and my app. Any suggestions?
Thanks,
/ravi
My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com
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why dont u just host the ie control in a standard dialog box?
use http post functions to communicate
it should be easy
certainly not enuff reason to install vs.net
"there is no spoon"
biz stuff about me
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Yes, hosting IE is easy, but I want to override 404s, context menu handling, and most importantly, get/set data from the form to my app.
I suppose I could wade thru a lot of COM calls to make this happen, but our shop will be moving (eventually) to VC7, and I thought I'd lead the way and experience the pain so the rest of my team doesn't have to.
/ravi
My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com
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I was reading about output iterators (write only) in stl, and the prototype shows that the * (deref) returns (*this)
Iterator& operator * ();
For a regular iterator I had interpreted *I as meaning "contents of I", and it gave back a reference to some type T stored at that iterator since the normal prototype is
T& operator *();
I am puzzled now. If I want to assign a T value x to the location of the iterator, how can I say:
*I = tval;
??
The lhs is a ref to an iterator (a pointer) and the rhs is of type T. I am thoroughly confused.
thanks,
ns
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The *I = tval is correct. You can assign a object of type T to a reference of type T&
Robert-Antonio
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Except that the LHS is not a ref to T....
Iterator& operator * (); its a ref to an iterator....
Thanks,
ns
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Sorry, I've read so fast 
You should use simply I = val
This assign val to a position described by I and increments I by 1.
Robert-Antonio
"A flower walked around a meadow. She saw a beatiful human and plucked off his head."
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If anyone knows how to send a two dimensional array to a function, I would be immensely grateful, because I have tried all sorts of ways, and the compiler (VC6) keeps rejecting every which way I try.
In case you're thinking the following code would work, IT DOES NOT!! The compiler rejects it with the message, "Cannot convert parameter 1 from 'short [5][5]' to 'short**'."
short tree[5][5];
void Func(short** treeArray);
Func(tree); Single dimension arrays are no problem. Those get accepted without even as much as a second glance. It's when you get into the multi-dimensional arrays that the compiler seems to draw the line.
Thanks for any insight.
William
Fortes in fide et opere!
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Here's one way:
void Func( short treeArray[][5] );<br />
Func(tree);
Here's another:
void Func( int *treeArray )<br />
Func(&tree[0][0]);
A rich person is not the one who has the most, but the one that needs the least.
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Thanks for replying.
The compiler did not like the first way, it reported an error. It accepted the second way and the program worked fine!! 
Thanks for the help! I appreciate the generosity of your CodeProject spirit!
William
Fortes in fide et opere!
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WREY wrote:
The compiler did not like the first way, it reported an error.
And that error was?? It worked fine for me using VS6.
A rich person is not the one who has the most, but the one that needs the least.
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My apology!
In my over-excitement I must have mistyped something because when I went back over the first sample and retyped it properly, everything worked!
With the same degree of sobriety, I retyped the second sample over, and interestingly that is the one which isn't working now. The compiler produced the following message: "subscript requires array or pointer type". Here's the code.
short tree[5][5] = {0};
void Func(short* treeArray);
Func(&tree[5][5]);
void Func(short* treeArray)
{
for(short i=0; i<5; ++i)
{
for(short j=0; j<5; ++j)
cout<<treeArray[i][j] <<' ';
}
}The reason why I initially reported the second sample had worked, was because I had accessed it as a single dimension array. This time (as you can see from the sample) I am accessing it as a two-dimensional array and the compiler is producing the error message shown above.
For the fun of it, I did enter some data into the 'tree' array to see if it gets printed (which is what happened when I originally accessed it as a single dimension), but now, it's not even getting compiled.
William
Fortes in fide et opere!
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void Func(short* treeArray)
{
for(short i=0; i<5; ++i)
{
for(short j=0; j<5; ++j)
cout << treeArray[(i * 5) + j] << ' ';
}
}
A rich person is not the one who has the most, but the one that needs the least.
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