Detecting memory leaks

Hi all,

in Visual Studio 2003 at the end of an debugging session there comes a list of detected memory leaks but
with Visual Studio 2005 there is no list printed.

Following obviously wrong program does not display any memory leak at the end of debugging.

int main(int argc, char *argv[])
{
     char *lpc = new char[20];
}

I am using native C++ without CLR, MFC or ATL - just Qt 4 for portability.

Is there just a wrong configuration of the project/solution or the IDE?

Thanks in advance
Dirk