C / C++ / MFC

  CMainFrame *pFrame = (CMainFrame*)AfxGetMainWnd();
  CChildFrame *pChild = (CChildFrame *) pFrame->GetActiveFrame();

  CRect WndRect;

      //:-D thx Schlaubi
  CWnd* pMDIClientWnd = CWnd::FromHandle(pFrame->m_hWndMDIClient);


  GetClientRect(WndRect);

  CBitmap     bitmap;
  CDC         *dcP;
  CDC         memDC;
  CRect       rect;

  dcP = GetWindowDC();
  memDC.CreateCompatibleDC(dcP);

 bitmap.CreateCompatibleBitmap(dcP,WndRect.right, WndRect.bottom);


 CBitmap *pOldBitmap = memDC.SelectObject(&bitmap);
 memDC.BitBlt(0, 0, WndRect.right,WndRect.bottom, dcP,2 , 2, SRCCOPY);

OpenClipboard();
 EmptyClipboard();

 SetClipboardData(CF_BITMAP, bitmap.GetSafeHandle());

 CloseClipboard();
 memDC.SelectObject(pOldBitmap);

    HBITMAP hbmp1 = (HBITMAP) SignatureBitmap;
    HBITMAP hbmp2 = (HBITMAP) bitmap;
    BITMAP bmp1, bmp2;
  //load the bitmaps in hbmp1 and hbmp2
    GetObject(hbmp1, sizeof(BITMAP), &bmp1);
  //get the first bitmap's data
    GetObject(hbmp2, sizeof(BITMAP), &bmp2);
  //get the first bitmap's data
  //if they differ in color depth or dimenstions they mismatch
    if(bmp1.bmBitsPixel != bmp2.bmBitsPixel ||	bmp1.bmHeight != bmp2.bmHeight || bmp1.bmWidth !=  bmp2.bmWidth)
	AfxMessageBox("prob");
else
{
	//get the bits of both bitmaps	
	LPBYTE data1 = (LPBYTE)bmp1.bmBits,		
		data2 = (LPBYTE)bmp2.bmBits;
	//the number of bytes per width	
	DWORD bmWidth = bmp1.bmWidth * (bmp1.bmBitsPixel / 8);
	//somthing is wrong with bmWidthBytes member in Win9x and Win2k
	//so it's better to calculate the offset yourself
       DWORD bmWidthBytes = bmWidth + (2 - bmWidth % 2) * bool(bmWidth % 2);
	//number of bytes in data1 and data2
	DWORD bytesize = bmp1.bmHeight * bmWidthBytes;
	//compare the two bitmap's bits	
	if(memcmp(data1, data2, bytesize) == 0)
		AfxMessageBox("goooooood");

	bitmap.Detach();
}

CDC         *dcP;
CDC         memDC;
CRect       WndRect;

dcP = GetWindowDC();
GetWindowRect(WndRect); //the window rect is the rect of the whole window
                            //while the client rect is of the client area only

CImage im; //CImage object
    //this is to create a DIB using CImage, the parameters are width, height,
    //color depth
im.Create(WndRect.Width(), WndRect.Height(), 24);
    //CImage::GetDC() return an HDC to the bitmap so you can use it
    //as any other dc
memDC.Attach(im.GetDC()); //attach the HDC into the memDC object
    //blit the window DC
memDC.BitBlt(0, 0, WndRect.right,WndRect.bottom, dcP,2 , 2, SRCCOPY);
memDC.Detach(); //detach the image HDC to prevent its destruction
im.ReleaseDC(); //this is needed for every call to GetDC()
    HBITMAP hbmp = im.Detach(); //you now have handle to DIB ready for use

BITMAP bmp1, bmp2;

GetObject(hbmp, sizeof(hbmp), &bmp1); //get the first bitmap's data
GetObject(hbmp, sizeof(hbmp), &bmp2); //get the first bitmap's data

if(memcmp(&bmp1, &bmp2, sizeof(bmp1) - sizeof(bmp1.bmBits)))
{
    AfxMessageBox("Prob");
}
else
{
    //get the bits of both bitmaps
    LPBYTE data1 = (LPBYTE)bmp1.bmBits,     data2 = (LPBYTE)bmp2.bmBits;
    //the number of bytes per width
    DWORD bmWidth = bmp1.bmWidth * (bmp1.bmBitsPixel / 8);
    //somthing is wrong with bmWidthBytes member in Win9x and Win2k
    //so it's better to calculate the offset yourself
    DWORD bmWidthBytes = bmWidth + (2 - bmWidth % 2) * bool(bmWidth % 2);
    //number of bytes in data1 and data2
    DWORD bytesize = bmp1.bmHeight * bmWidthBytes;
    //compare the two bitmap's bits
    if(memcmp(data1, data2, bytesize) == 0)
        AfxMessageBox("gooooooooooooooood");
}

if(data1 == 0)
   AfxMessageBox("Error in bitmap 1");
if(data2 == 0)
   AfxMessageBox("Error in bitmap 2");

ModifyStyle(WS_CAPTION, 0);
SetWindowPos(NULL, 0, 0, 0, 0, SWP_DRAWFRAME |
  SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER);

	__int64 l1, l2, l3;
	l1 = 256;
00417053  mov         dword ptr [l1],100h 
0041705A  mov         dword ptr [ebp-14h],0 
	l2 = 128;
00417061  mov         dword ptr [l2],80h 
00417068  mov         dword ptr [ebp-24h],0 
	l3 = l1 + l2;
0041706F  mov         eax,dword ptr [l1] 
00417072  add         eax,dword ptr [l2] 
00417075  mov         ecx,dword ptr [ebp-14h] 
00417078  adc         ecx,dword ptr [ebp-24h] 
0041707B  mov         dword ptr [l3],eax 
0041707E  mov         dword ptr [ebp-34h],ecx 
	l3 = l1 - l2;
00417081  mov         eax,dword ptr [l1] 
00417084  sub         eax,dword ptr [l2] 
00417087  mov         ecx,dword ptr [ebp-14h] 
0041708A  sbb         ecx,dword ptr [ebp-24h] 
0041708D  mov         dword ptr [l3],eax 
00417090  mov         dword ptr [ebp-34h],ecx 
	l3 = l1 * l2;
00417093  mov         eax,dword ptr [ebp-24h] 
00417096  push        eax  
00417097  mov         ecx,dword ptr [l2] 
0041709A  push        ecx  
0041709B  mov         edx,dword ptr [ebp-14h] 
0041709E  push        edx  
0041709F  mov         eax,dword ptr [l1] 
004170A2  push        eax  
004170A3  call        @ILT+1330(__allmul) (411537h) 
004170A8  mov         dword ptr [l3],eax 
004170AB  mov         dword ptr [ebp-34h],edx 
	l3 = l1 / l2;
004170AE  mov         eax,dword ptr [ebp-24h] 
004170B1  push        eax  
004170B2  mov         ecx,dword ptr [l2] 
004170B5  push        ecx  
004170B6  mov         edx,dword ptr [ebp-14h] 
004170B9  push        edx  
004170BA  mov         eax,dword ptr [l1] 
004170BD  push        eax  
004170BE  call        @ILT+5340(__aulldiv) (4124E1h) 
004170C3  mov         dword ptr [l3],eax 
004170C6  mov         dword ptr [ebp-34h],edx 
	l3 = l1 % l2;
004170C9  mov         eax,dword ptr [ebp-24h] 
004170CC  push        eax  
004170CD  mov         ecx,dword ptr [l2] 
004170D0  push        ecx  
004170D1  mov         edx,dword ptr [ebp-14h] 
004170D4  push        edx  
004170D5  mov         eax,dword ptr [l1] 
004170D8  push        eax  
004170D9  call        @ILT+5345(__aullrem) (4124E6h) 
004170DE  mov         dword ptr [l3],eax 
004170E1  mov         dword ptr [ebp-34h],edx