C / C++ / MFC

BYTE *var= new BYTE [100]<pre>
allocates a lump of memory for your use (it may be longer than 100 bytes long) and sets 
var to point to it.

<pre>var=NULL;

delete [] var;

BYTE *var = new BYTE [100];    // Allocate some short term memory

...                            // Use it for some purpose

delete [] var;                 // "give it back"
var = NULL;                    // Forget about it so we don't use it my mistake.

... CDialog::OnInitDialog(...bla...)
{
...    
 SetWindowText("Step to something");
...
}

<br />
<small>NewLeverancier /* witch is the new pointer */ = new CLeverancierStruct(*Leverancier /* witch is the pointer to the struct */);<br />
m_LeveranciersLijst/* witch is the list */.AddTail(NewLeverancier);</small>

struct Foo
{
    int nBar;
};

CTypedPtrList<CPtrList, Foo *> FooList;

Foo *f1 = new Foo;
Foo *f2 = new Foo;

f1->nBar = 3;
f1->nBar = 17;

FooList.AddTail (f1);
FooList.AddTail (f2);

Foo *f = FooList.GetHead ();
TRACE1("nBar=%i\n", f->nBar);
f = FooList.GetHead ();
TRACE1("nBar=%i\n", f->nBar);

...

void OnDblClick()
{
  CMyDialog dlg (this);
  dlg.m_pListCtrl = &listCtrl;
  dlg.DoModal();
}