C / C++ / MFC

((CMyApp*)AfxGetApp())->m_MyGlobalVariable

_variant_t v;
char *sz;

sz=new char[10];
strcpy(sz, "aaa");

v=sz;
AfxMessageBox((_bstr_t)v);
delete [] sz;

m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

// Set the icon for this dialog.  The framework does this automatically
//  when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE);       // Set big icon
SetIcon(m_hIcon, FALSE);      // Set small icon

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CMyDialog::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

HICON     m_hIcon;