C / C++ / MFC

void ProcessMerging(CMap<UINT,UINT,UINT,UINT>* pcResult,
                    const CUIntArray& caFirst,
                    const CUIntArray& caSecond)
{
  if (pcResult) {
    pcResult->RemoveAll();
    int iFirstSize(caFirst.GetCount()),
        iSecondSize(caSecond.GetCont()),
        i(0);
    for (i = 0; i < iFirstSize; i++) {
      pcResult->SetAt(caFirst[i], 0);
    }
    for (i = 0; i < iSecondSize; i++) {
      pcResult->SetAt(caSecond[i], 0);
    }
  }
}

HWND hwndProgress = GetDlgItem(m_hwnd, IDC_PROGRESS1);
LONG_PTR lStyle = ::GetWindowLongPtr(hwndProgress, GWL_STYLE);
lStyle |= PBS_MARQUEE;
::SetWindowLongPtr(hwndProgress, GWL_STYLE, lStyle); 
::SendMessage(hwndProgress, PBM_SETMARQUEE, WPARAM(TRUE), LPARAM(50));

CONTROL         "",IDC_PROGRESS1,"msctls_progress32",PBS_MARQUEE,7,7,156,14

#define PBS_MARQUEE 8

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"> 
  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
    <security>
      <requestedPrivileges>
        <requestedExecutionLevel
          level="asInvoker"
          uiAccess="false"
        />
      </requestedPrivileges>
    </security>
  </trustInfo>
  <dependency> 
    <dependentAssembly> 
      <assemblyIdentity 
        type="win32" 
        name="Microsoft.Windows.Common-Controls" 
        version="6.0.0.0" 
        processorArchitecture="X86" 
        publicKeyToken="6595b64144ccf1df" 
        language="*" 
      /> 
    </dependentAssembly> 
  </dependency> 
</assembly>

CInternetSession objInetSession;
		CHttpFile *pHttpFile;
		CString tmpStr;
		char inBuf[10000];
		UINT nBytesRead;
		try
		{
			pHttpFile =(CHttpFile *) objInetSession.OpenURL(
				CString("http://localhost"),
				1,
				INTERNET_FLAG_TRANSFER_ASCII,
				NULL,
				0 
				);
		}
		catch(CInternetException* exp)
		{
			AfxMessageBox((LPCTSTR)"Some thing went astay",0,0);
		} 
		nBytesRead = pHttpFile->Read(inBuf, sizeof(inBuf));
        AfxMessageBox(CString(inBuf,nBytesRead));
	}
	return nRetCode;

#pragma once

class CDoc;
class CMyScrollView : public CScrollView
{
	DECLARE_DYNCREATE(CMyScrollView)
	DECLARE_MESSAGE_MAP()

public:
	CMyScrollView();
	virtual ~CMyScrollView();

	CDoc* GetDocument();

protected:
	virtual void OnDraw(CDC* pDC);
	virtual void OnInitialUpdate();

private:
	int Height;
	int Width;
	CBitmap* Bitmap;
	CDC* MemDC;
};

#include "stdafx.h"
#include "MyScrollView.h"

IMPLEMENT_DYNCREATE(CMyScrollView, CScrollView)
BEGIN_MESSAGE_MAP(CMyScrollView, CScrollView)
END_MESSAGE_MAP()

CMyScrollView::CMyScrollView() : 
	Bitmap(new CBitmap), Width(1000), Height(200), MemDC(new CDC)
{
	MemDC->CreateCompatibleDC(NULL);
}

CMyScrollView::~CMyScrollView()
{
	delete Bitmap;
	delete MemDC;
}

CDoc* CMyScrollView::GetDocument()
{ return (CDoc*)m_pDocument; }

void CMyScrollView::OnInitialUpdate()
{
	CScrollView::OnInitialUpdate();
	
	GetParentFrame()->SetWindowText("CMyScrollView");

	CClientDC dc(this);
	Bitmap->CreateCompatibleBitmap(&dc, Width, Height);
	Bitmap->SetBitmapDimension(Width, Height);

	CBitmap* OldBitmap = MemDC->SelectObject(Bitmap);

	MemDC->PatBlt(0, 0, Width, Height, BLACKNESS);
	CPen WhitePen(PS_SOLID, 1, RGB(255,255,255));
	CPen* 	OldPen = MemDC->SelectObject(&WhitePen);
	MemDC->MoveTo(0, 0);				// ie top left
	MemDC->LineTo(Width, Height);		// ie bottom right
	MemDC->MoveTo(Width, 0);			// ie top right
	MemDC->LineTo(0, Height);			// ie bottom left
	MemDC->SelectObject(OldPen);

	CPen RedPen(PS_SOLID, 1, RGB(255,0,0));
	OldPen = MemDC->SelectObject(&RedPen);
	MemDC->Rectangle(0,0,10,10);		// red rect in top left
	MemDC->SelectObject(OldPen);

	CPen GreenPen(PS_SOLID, 1, RGB(0,255,0));
	OldPen = MemDC->SelectObject(&GreenPen);
	MemDC->Ellipse(Width-20, Height-20, Width, Height);	// green circle bottom right
	MemDC->SelectObject(OldPen);

	CRect Rect(0,Height-20,20,Height);
	CBrush Brush(RGB(0,0,255));
	MemDC->FillRect(Rect, &Brush);		// blue rect in bottom left

	MemDC->SelectObject(OldBitmap);

	SetScrollSizes(MM_TEXT, CSize(Width, Height));
	ResizeParentToFit(TRUE);
}

void CMyScrollView::OnDraw(CDC* pDC)		// works!
{
	if (Bitmap)
	{
		pDC->SetStretchBltMode( COLORONCOLOR );

		CBitmap* OldBitmap = MemDC->SelectObject(Bitmap);

		pDC->BitBlt( // l, t, w, h
			0, 0, Width, Height,
			MemDC, 
			0, 0,
			SRCCOPY);

		MemDC->SelectObject(OldBitmap);
	}
}