Newsgroup: it.comp.lang.c++
Titolo: interfaccia grafica

Chi potrebbe inviarmi un esempio di interfaccia grafica in c++ o un sito su
cui trovare tali esempi (anche semplicissimi).
Grazie

Prego una semplice finestra in Win32:
/* Creation of a simple Windows API program */
#include <windows.h>
/* Declare Windowsprocedure */
LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM);
/* Make the classname into a global variabel */
char szClassName[ ] = "MyLittleWindow";
int WINAPI WinMain(HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR
lpszArgument,
int nFunsterStil)
{
    HWND hwnd; /* This is the handle for our window */
    MSG messages; /* Here messages to the application is saved */
    WNDCLASSEX wincl; /* Datastructure for the windowclass */
    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure; /* This function is called by
windows */
    wincl.style = CS_DBLCLKS; /* Ctach double-clicks */
    wincl.cbSize = sizeof(WNDCLASSEX);
    /* Use default icon and mousepointer */
    wincl.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor(NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL; /* No menu */
    wincl.cbClsExtra = 0; /* No extra bytes after the window class */
    wincl.cbWndExtra = 0; /* structure or the window instance */
    /* Use lightgray as the background of the window */
    wincl.hbrBackground = (HBRUSH) GetStockObject(LTGRAY_BRUSH);
    /* Register the window class, if fail quit the program */
    if(!RegisterClassEx(&wincl)) return 0;
    /* The class is registered, lets create a program*/
    hwnd = CreateWindowEx(
           0, /* Extended possibilites for variation */
           szClassName, /* Classname ("MyLittleWindow") */
           "A Simple Windows API program", /* Title Text */
           WS_OVERLAPPEDWINDOW, /* defaultwindow */
           CW_USEDEFAULT, /* Windows decides the position */
           CW_USEDEFAULT, /* where the window end up on the screen */
           280, /* The programs width */
           180, /* and height in pixels */
           HWND_DESKTOP, /* The window is a childwindow to desktop */
           NULL, /* No menu */
           hThisInstance, /* Program Instance handler */
           NULL /* No Window Creation data */
                          );
           /* Make the window visible on the screen */
           ShowWindow(hwnd, nFunsterStil);
           /* Run the nessageloop. It will run until GetMessage( ) returns 0
*/
           while(GetMessage(&messages, NULL, 0, 0))
           {
                 /* Send message to WindowProcedure */
                 DispatchMessage(&messages);
           }
           /* The program returvalue is 0 - The value that
PostQuitMessage( ) gave */
           return messages.wParam;
           }
           /* This function is called by the Windowsfunction
DispatchMessage( ) */
           LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM
wParam,
           LPARAM lParam)
           {
             switch (message) { /* handle the messages */
             case WM_DESTROY:
             PostQuitMessage(0); /* send a WM_QUIT to the messagequeue */
             break;
             default: /* for messages that we don't deal with */
             return DefWindowProc(hwnd, message, wParam, lParam);
             }
             return 0;
             }