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i Think u r not clear from above two ans so i m explaing u ...
Pointer To Const
syntex:
int const *ptr;
or
const int *ptr;
that means they are pointer to const int. so we can't change the value of they are pointing. we can change what they r pointing....
for example:
int i = 10;
int b = 20;
int const *ptr = & i;
(*ptr)++ ; // will give error
ptr = & b ; // OK
Const pointer:
syntex :
int * const ptr1;
it is const pointer so what it is pointing is const so we must initialize at the time of declaration
so synetx is like
int * const ptr1 = & someintegervarible;
for example:
int i = 10;
int b = 20;
int * const ptr1 = & i; //required initialization
(*ptr1)++ ;//OK
ptr1 = & b; // Error
we also have
const pointer to const :
syntex :
int const * const ptr2 = & i; // required initialization
or
const int * const ptr2 = & i; // required initialization
Neither address which that pointer is pointing nor the value that pointer pointing will change.
Hiren Thakkar
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I am creating an dll using VC++.NET, am using it for serial key validation(Customer Information) at Msi installation, while the dll is doing some process i want to execute an exe.
Using the code "ShellExecute(NULL,"Open","test.exe","TEST",NULL,SW_MAXIMIZE); " i can able to run the exe, but the exe should be presented in the WINNT folder, i want to run the exe, which may be presented in any part of the system(physical drive). Also how to declare a string and assign a value in the VC++(sorry for this silly question, i am new to VC++).
Also is it possible to communicate an VC++ with SQL server? If possible, plz show me some examples, so that i can learn and implement in my project.
Thanks is advance
Know is Drop, Unknown is Ocean
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if you want to communicate with a SQL-Server I strongly recommand (tata): SQL 
Look for samples of SQL, ODBC you'll find them.
Greetings from Germany
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Hi
Thanks for your suggestion. Actually i am new to this concept. plz suggest me some simple sample source to learn
Know is Drop, Unknown is Ocean
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Exelioindia wrote: Actually i am new to this concept
new to what? Searching? Learning?
CodeProject has a mountain of Articles about Database access using C++ and .NET. They all come with sample source code. Stop asking for people to give you stuff and start searching and reading.
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There's many ways to access databases from C++.
For info on data access technologies included with Windows, see here[^].
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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Hi all,
is there any way to know if the user is calling the print command from the menu/toolbar or from the button "print" that appears in the preview?
I am interested in, because in one of my views, printing is limited to a certain number of elements. The user must choose 8 from (up to) 24 to be shown in the preview / printed in paper.
At the moment, it is needed to choose the elements both times, by preview start and by print start (before choosing the printer and number of copies).
But as the selection has already been made by selecting preview. I would like to send to the printer the same elements that are shown in the preview, so I need to know where the print command is being selected.
I have tried:
CMDIFrameWnd *pFrame = (CMDIFrameWnd*)AfxGetApp()->m_pMainWnd;
CMDIChildWnd *pChild = (CMDIChildWnd *) pFrame->GetActiveFrame();
CParamRegView *pView = (CParamRegView *) pChild->GetActiveView();
if (pView->IsKindOf(RUNTIME_CLASS(CMyView)))
AfxMessageBox ("CFormView");
else
AfxMessageBox ("Another");
But I alway get the same message, so it does not separate
What should I use to do it?
Greetings.
--------
M.D.V.
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
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I have reach what i wanted using two variables that get a value when pInfo->m_bPreview true or not, and afterwards I ask the combination (similar to an XOR) to know if the last activevie was my secondary view or the print preview.
Greetings.
--------
M.D.V.
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
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Hello,
does std::vector have an index operator,
i mean can i read data from vector directly over an index
wthout search items in it!?
like this:
vector<CObject>VectorObjects;
VectorObjects.push_back(myCObject);
myNexCObject = VectorObjects[0];
thanks in advance
termal
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Yes, std::vector override the [] operator, so you can safely do it.
Of course, if you try to access an index that is outside the bounds your vector, then'll get an exception.
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Hello,
thanks for answer and help!
regards
termal
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use vector::at.
Ex. myNexCObject = VectorObjects.at(0);
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std::vector.at() does validate the vector boundaries.
The operator[] does not. It will happily access outside the vector. No problem when you know that, though.
Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words
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Hello,
thanks for input!!
regards
termal
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You mentioned seaching also. If this is something you are looking for, then I suggest using the std::map class instead of a vector.
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is there any problem specifying custom index in TlsSetValue other than the index returned by TlsAlloc ??
//
TlsSetValue ( 1 , (LPVOID)MyData ) ;
Tahnks & regards
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nitin3 wrote: ...other than the index returned by TlsAlloc ??
Not according to the docs.
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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As long at the index was allocated by using TlsAlloc( ), then there should be no problem.
---
Yours Truly, The One and Only!
devmentor.org
Design, Code, Test, Debug
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Hi All,
In my from I want such type of function which copy directory from one path to other. The function should be as
CopyDir(SourcePath,DestinationPath);
Is there any API provided by MFC for doing the same.
Thanks in Advance
Atul
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There is no direct function to copy directory.
But you can use FindFirstFile/FindNextFile to search files in directory.
Then use CopyFile function to copy files.
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Hi
How to change associativity of operators in C++,
e.g.
if we have
int a = 15;
int b = 5;
int c = a---b;
then compiler interpret this expression as
int c = (a--) - b;
what I want, is like int c = a -(--b);
is there any way to achieve this.
Please suggest me.
Thanks & Regards
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Use proper parenthesis in your code.
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I don't think so.
Because the compiler doesn't know your minds. All automatic parsing is defined by rules.
Like mathematics, if you calculate 5+5*6 you should begin with 5*6 and then + 5
if you specifie it (5+5)*6 you start with adding 5+5 then the *6
It's the same in programmation.
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