C / C++ / MFC

const int i = 10;

int x = 10;

cout << "i= " << 10 << endl;
cout << "j= " << x << endl;
cout << "&i= " << &x << endl;
cout << "&j= " << &x << endl;

x++;

cout << "j= " << x << endl;
cout << "i= " << 10 << endl;

Aabid wrote:

the code declares a const integer and a reference to it. incrementing a reference adds 1 to j and outputs as 11, that is fine.

wangafei wrote:

but it's best to use mfc

Rajeev.Goutham wrote:

Problem is existing application in non mfc. for displaying a small dialog do i need to make that existing application also Mfc one. please guide.

wangafei wrote:

yes! mfc can use api and win32

so you can do anything without mfc

but it's not easy

CString  bmpFilePath;
HBITMAP hBmp;
hBmp = (HBITMAP)::LoadImage(NULL,bmpFilePath,IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);
CBitmap bmp;
bmp.Attach(hBmp);
CDC dcImage;
if(!dcImage.CreateCompatibleDC(pDC))
return;
BITMAP bm;
CBitmap* pOldBitmap;									
bmp.GetBitmap(&bm);  				
pOldBitmap = dcImage.SelectObject(&bmp);  				
pDC->BitBlt(350,100, bm.bmWidth, bm.bmHeight, &dcImage, 0, 0, SRCCOPY);
dcImage.SelectObject(pOldBitmap);

// BMP, GIF, JPEG, PNG, TIFF, Exif, WMF, and EMF
HBITMAP mLoadImg(WCHAR *szFilename)
{
    HBITMAP result=NULL;

    Gdiplus::Bitmap* bitmap = new Gdiplus::Bitmap(szFilename,false);
    bitmap->GetHBITMAP(NULL, &result);
    delete bitmap;
    return result;
}

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
    Gdiplus::GdiplusStartupInput gdiplusStartupInput;
    ULONG_PTR gdiplusToken;
    Gdiplus::GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

    hInst = hInstance;
    InitCommonControls();
    // The user interface is a modal dialog box
    DialogBox(hInstance, MAKEINTRESOURCE(DLG_MAIN), NULL, (DLGPROC)DialogProc);
    Gdiplus::GdiplusShutdown(gdiplusToken);
}