C / C++ / MFC

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void CThumbBmpView::OnPaint()<br />
{<br />
	CPaintDC dc(this); // device context for painting<br />
	// TODO: Add your message handler code here<br />
	// Do not call CListView::OnPaint() for painting messages<br />
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		CRect r;<br />
		GetClientRect(&r);<br />
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		// Paint to a memory device context to help<br />
		// eliminate screen flicker.<br />
		CXTPBufferDC memDC(dc, r);<br />
		memDC.FillSolidRect(r, (RGB(255,255,255)));<br />
			<br />
		OnPrepareDC(&memDC);<br />
			OnDraw(&memDC);<br />
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}<br />
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void CThumbBmpView::OnDraw(CDC* pDC)<br />
{<br />
	// TODO: Add your specialized code here and/or call the base class<br />
	<br />
	HANDLE hFile;<br />
	DWORD  dwNumberOfBytesToRead;<br />
	DWORD  dwNumberOfBytesRead;<br />
	<br />
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	hFile = CreateFile( "D:\\preview.bmp",<br />
						GENERIC_READ, <br />
						FILE_SHARE_READ,<br />
						NULL,<br />
						OPEN_EXISTING,<br />
						FILE_ATTRIBUTE_NORMAL,<br />
						NULL );<br />
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	if( hFile == INVALID_HANDLE_VALUE )<br />
	{	<br />
		MessageBox( "Invalid Handle", "ERROR", MB_ICONERROR);<br />
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	}<br />
	else<br />
	{<br />
		//	MessageBox( "File Opened successfully");<br />
		BYTE *Buffer;<br />
		DWORD p=SetFilePointer( hFile, 0x000, NULL, FILE_BEGIN );<br />
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		Buffer = new BYTE [2363392+1];<br />
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		BOOL bResult = ReadFile( hFile,<br />
								 Buffer,<br />
								// nNumberOfBytesToRead, //specify the file size.<br />
								 2363392,<br />
								 &dwNumberOfBytesRead,  //<br />
								 NULL<br />
								);<br />
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		if(!bResult)<br />
			MessageBox("Error");<br />
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		//bmp.bmType		=0;<br />
		//bmp.bmWidth		=32;<br />
		//bmp.bmHeight	=32;<br />
		//bmp.bmWidthBytes=1024;<br />
		//bmp.bmPlanes	=2;<br />
		//bmp.bmBitsPixel	=32;<br />
		//bmp.bmBits		=Buffer;<br />
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		if(!bitmap.CreateBitmap(1000,500,1,32,Buffer))<br />
			MessageBox("cant Create Bitmap");<br />
	<br />
	}<br />
	CDC dcCompatible;<br />
	if ( !dcCompatible.CreateCompatibleDC( pDC ) )<br />
	{<br />
		return;<br />
	}<br />
	CBitmap* pOld = dcCompatible.SelectObject( &bitmap );<br />
<br />
	BITMAP bmInfo;<br />
	if ( bitmap.GetObject( sizeof( bmInfo ), &bmInfo ) != 0 )<br />
	{<br />
		pDC->BitBlt( 0,0, bmInfo.bmWidth, bmInfo.bmHeight, &dcCompatible, 0,0, SRCCOPY );<br />
		//pDC->StretchBlt(0,0,100,90,&dcCompatible,10,10,110,100, 32); <br />
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	}<br />
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	dcCompatible.SelectObject( pOld );<br />
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}<br />
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