C / C++ / MFC

m_foreHwnd1 = GetForegroundWindow();
CString szMessage;
szMessage.Format(_T("ForeHwnd1: 0x%08X\r\n"), m_foreHwnd1);
OutputDebugString(szMessage);

CString str;<br />
str.Format("%x",m_foreHwnd1);<br />
OutputDebugString(str);

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)<br />
{<br />
// TODO: Add your specialized code here and/or call the base class<br />
BOOL res = m_splilter.CreateStatic(this,2,1);<br />
m_splilter.CreateView(0,0,RUNTIME_CLASS(CsplView),CSize(0, 200), pContext);<br />
m_splilter.CreateView(1,0,RUNTIME_CLASS(COtherView),CSize(200, 200), pContext);<br />
return TRUE;<br />
}

CWnd * p = pView->GetParent();
ASSERT_KINDOF(CMDIChildWnd, p);
pMainFrm->MDIActivate(p);

CKernelView* CMainFrame::ActivateView(CModel* pParentModel)
{
	//Activate new or existing view containing pParentModel

	CKernelView *pView, *pActiveView;
	CWnd* pBar;
	CMDIFrameWnd *pFrame;
	CMDIChildWnd *pChild;

	pBar = GetDlgItem(IDD_NAVIGATOR_BAR);

	//Get a pointer to the active view (there are three stages to this)
	pFrame = (CMDIFrameWnd*)AfxGetApp()->m_pMainWnd;		//Get a pointer to the active MDI window
	pChild = (CMDIChildWnd *) pFrame->GetActiveFrame();		//Get the active MDI child window.
	pActiveView = (CKernelView*)pChild->GetActiveView();	//Get the View attached to the active MDI child window

	if (pActiveView->m_pParentModel == pParentModel)
		pView = pActiveView;	//The required parent model is already in the active view
	else if (pParentModel->m_pShadow != NULL)
	{
		//There is already a View displaying this parent, activate its frame
		pView = pParentModel->m_pShadow->m_pView;
		pFrame = (CMDIFrameWnd*)pView->GetParentFrame();
		pFrame->ActivateFrame(SW_RESTORE);
	}
	else if (pBar->IsDlgButtonChecked(IDC_TRACK_NEW))
		pView = pParentModel->OpenView(m_pDocViewed, pParentModel->m_PlantFlag);	//Open new window
	else
	{
		//Reuse current window
		pView = pActiveView;
		pView->ChangeModel(pParentModel);	
	}

	return pView;
}

FILE* fp = NULL;
wchar_t buf[201];
wchar_t bom;

if ((fp = fopen("c:\\GRCasual.txt", "r")) == NULL) // opens the file 
{
  return 0;
}

size_t read = fread(&bom, sizeof(bom), 1, fp);
if(bom == 0xFEFF)
{
  while(!feof(fp))
  { 
    read = fread(buf, sizeof(buf[0]), (sizeof(buf) / sizeof(buf[0])) - 1, fp);
    buf[read] = '\0';
    MessageBox(NULL, buf, L"Text", MB_OK);
  }
}

if( fp )
  fclose(fp);

return 0;