C / C++ / MFC

CMyClass data;
m_pMyListCtrl->SetItemData(nItem, (DWORD_PTR) &data);

Cedric Moonen wrote:

1) have data be a member of the class. But then, that doesn't make a lot of sense in the current scenario (why would you need to store it in the data pointer of the list control then ?)

fantasy1215 wrote:

I'm unfamiliar to CListCtrl::SetItemData.

Cedric Moonen wrote:

1) have data be a member of the class. But then, that doesn't make a lot of sense in the current scenario (why would you need to store it in the data pointer of the list control then ?)

sujtha wrote:

Now I want to read the login and password of the user the is logged in into windows...

// C2660 expected

placement
    Provides a way of passing additional arguments if you overload new.

CPallini wrote:

At least they are honests
// C2660 expected

CPallini wrote:

hence you probably have to overload the operator to use additional placement argument.

Maxwell Chen wrote:

In the comment, it specifies the global operator new. I guess MSDN didn't intend to ask user implement an operator overload.

Matthew Faithfull wrote:

If I remember rightly this is implemented in the STL so you need to include the right STL header to make this work #include <memory>

Matthew Faithfull wrote:

Have you tried #include< new > ?

class A {
public:
    A(int) { throw "Fail!"; }

	void *operator new(size_t stAllocateBlock);
	void *operator new(size_t stAllocateBlock, char chInit);
	void *operator new(size_t stAllocateBlock, char*, int);
};

// a simple new
void *A::operator new(size_t stAllocateBlock)
{
	void *pvTemp = ::malloc( stAllocateBlock );
	return pvTemp;
}

// a placement new with 3 arguments
void * A::operator new(size_t stAllocateBlock, char*, int)
{
	void *pvTemp = ::malloc( stAllocateBlock );
	return pvTemp;
}

// a placement new with 2 arguments
void * A::operator new(size_t stAllocateBlock, char chInit)
{
	void *pvTemp = ::malloc( stAllocateBlock );
	if( pvTemp != 0 )
		memset( pvTemp, chInit, stAllocateBlock );
	return pvTemp;
}

Member 754960 wrote:

If you follow the links and read the grammer for the placement operator new you should come up with the following for the sample class (see following note below):