C / C++ / MFC

void main( void )
{
    int a; // this variable exists as long as main() does
 
    {
        int *x; // can access both a and x here
        x = new int;
    }
 
    // x no longer exists since it has gone out of scope.  However, the
    // memory that was allocated has not been freed
}

class someclass
{
public:
    void somefunction(int *n)
    {
        a = n;
    }
private:
    int *a;
};

void main( void )
{
    someclass sc;

    {
        int x = 5;
        sc.somefunction(&x);
    }

    // at this point, the object sc cannot do anything with its member
    // variable a because the variable x that it pointed to no longer
    // exists
}

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

	CGCICsettings* mySettings = new CGCICsettings;<br />
<br />
	mySettings->GetRegSettings();<br />
	mySettings->ipAddress;<br />

void somefunction( void )
{
    CGCICsettings* mySettings = new CGCICsettings;
 
    mySettings->GetRegSettings();
    // use mySettings->ipAddress here
    delete mySettings;
}

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

int nIndex = GetCurSel();
CString strText;
GetText(nIndex, strText);

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

CStatic* pflecha = ( CStatic* ) GetDlgItem( IDC_FLECHA );
pflecha->GetClientRect( &flecharect );
pflecha->MapWindowPoints( this, &flecharect );

m_font.CreateStockObject(ANSI_FIXED_FONT); // just an example.  create font however you need
m_combobox.SetFont(&m_font);

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

typedef  byte  SkNetMAC[6];
 
bool  FkNetGetMacA( CkStr SA, SkNetMAC &MAC )
{
	if( SA.IsEmpty() )  return(false);
 
#if 1  // get local or remote MAC given an IP using ARP (Win2K+)
 
	ulong   rc = 0,
	        ml = sizeof(MAC);
	IPAddr  ip = inet_addr( SA.PtrSafe(0) );
 
	rc = ::SendARP(ip, 0, (ulong*)&MAC, &ml);
 
#else  // get local MAC associated with IP by querying adapter info (Win*)
 
	ulong             rc = 0,
	                  al = 0;
	IP_ADAPTER_INFO  *ai = NULL,
	                 *ac = NULL;
	IP_ADDR_STRING   *ip = NULL;
 
	rc = ::GetAdaptersInfo(ai, &al);
	if( rc != ERROR_BUFFER_OVERFLOW )  return(false);
 
	ai = (IP_ADAPTER_INFO*)ckMemTemp.Calloc(al);
	if( !ai )  return(false);
 
	rc = ::GetAdaptersInfo(ai, &al);
	if( rc != ERROR_SUCCESS )  goto e_FkNetGetMacA;
 
	// there can be a many to one relationship between
	// ip's and addapters - search adapters for matching IP
	for( ac = ai;  ac;  ac = ac->Next ) {
		for( ip = &ac->IpAddressList;  ip;  ip = ip->Next ) {
			if( SA == ip->IpAddress.String ) {
				FkMemCpy(ac->Address, &MAC, sizeof(MAC));
				goto e_FkNetGetMacA;
			}
		}
	}
 
	e_FkNetGetMacA:
	ckMemTemp.Free(ai);
 
#endif
 
	return(true);
}