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#include <windows.h>
 
long WINAPI DCDemoWndProc (HWND, UINT, UINT, LONG);
 
/*  WINAPI - îïðåäåëÿåò ïîðÿäîê ïåðåäà÷è ïàðàìåòðîâ ïðè âûçîâå ïðîöåäóðû  */
int WINAPI WinMain (HINSTANCE hInstance, //Õýíäë ýêçåìïëÿðà ïðîãðàììû
                    HINSTANCE hPrevInstance, //Æýíäë ïðåäûäóùåãî ýêçåìïëÿðà ïðîãðàììû
                    LPSTR lpszCmdParam,
                    int nCmdShow) //Âèä îêíà
 
{
    HWND hWnd;               /* This is the handle for our window */
    MSG Msg;            /* Here messages to the application are saved */
    WNDCLASS WndClass;        /* Data structure for the windowclass */
    char szClassName[ ] = "DCDemo";
 
    /* The Window structure */
    WndClass.style = CS_HREDRAW | CS_VREDRAW;      /* Ïåðåðèñîâêà îêíà ïðè èçìåíåíèè âûñîòû è øèðèíû îêíà */
    WndClass.lpfnWndProc = DCDemoWndProc;      /* This function is called by windows */
    WndClass.cbClsExtra = 0;                      /* No extra bytes after the window class */
    WndClass.cbWndExtra = 0;                      /* structure or the window instance */
    WndClass.hInstance = hInstance;
    WndClass.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    WndClass.hCursor = LoadCursor (NULL, IDC_ARROW);
    WndClass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
    WndClass.lpszMenuName = "MyMenu";                 /* No menu */
    WndClass.lpszClassName = szClassName;
 
    /* Use default icon and mouse-pointer */
    /* Use Windows's default color as the background of the window */
 
    /* Register the window class, and if it fails quit the program */
    if (!RegisterClass(&WndClass))
    {
        MessageBox(NULL, "Cannot register class", "Error", MB_OK);
        return 0;
    }
    /* The class is registered, let's create the program*/
    hWnd = CreateWindow (
           szClassName,         /* Classname */
           "Programm 1",       /* Title Text */
           WS_OVERLAPPEDWINDOW |
           WS_VSCROLL |WS_HSCROLL,
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           CW_USEDEFAULT,
           CW_USEDEFAULT,
           NULL,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );
    
    if (!hWnd)
    {
        MessageBox(NULL, "Cannot create window", "Error", MB_OK);
        return 0;
    }
    
    /* Make the window visible on the screen */
    ShowWindow (hWnd, nCmdShow);
    UpdateWindow(hWnd);
    /* Run the message loop. It will run until GetMessage() returns 0 */
    while (GetMessage(&Msg, NULL, 0, 0))
    {
        /* Translate virtual-key messages into character messages */
        TranslateMessage(&Msg);
        /* Send message to WindowProcedure */
        DispatchMessage(&Msg);
    }
 
    /* The program return-value is 0 - The value that PostQuitMessage() gave */
    return Msg.wParam;
}
 
 
/*  This function is called by the Windows function DispatchMessage()  */
 
LRESULT CALLBACK DCDemoWndProc(HWND hWnd, UINT Message, UINT wParam, LONG lParam)
{
    HDC hDC, hCompatibleDC;
    PAINTSTRUCT PaintStruct;
    static HANDLE hBitmap;
    HANDLE hOldBitmap;
    RECT Rect;
    BITMAP Bitmap;
    static int nHorizDifference = 0, nVertDifference = 0;
    static int nHorizPosition = 0, nVertPosition = 0;
    switch (Message)                  /* handle the messages */
    {
           case WM_CREATE:
                hBitmap = LoadImage(NULL, "777.bmp", IMAGE_BITMAP,
                0, 0,
                LR_LOADFROMFILE);
           case WM_PAINT:
                hDC = BeginPaint(hWnd,&PaintStruct);
                GetObject(hBitmap, sizeof(BITMAP), &Bitmap);
                hCompatibleDC = CreateCompatibleDC(hDC);
                hOldBitmap = SelectObject(hCompatibleDC, hBitmap);
                GetClientRect(hWnd,&Rect);
                BitBlt(hDC, 0, 0, Rect.right, Rect.bottom,
                hCompatibleDC, nHorizPosition, nVertPosition, SRCCOPY);
                if((nHorizDifference = (Bitmap.bmWidth - Rect.right)) > 0)
                SetScrollRange(hWnd, SB_HORZ, 0, nHorizDifference, TRUE);
                else
                SetScrollRange(hWnd, SB_VERT, 0, 0, TRUE);
                if((nVertDifference = (Bitmap.bmHeight - Rect.bottom)) > 0)
                SetScrollRange(hWnd, SB_VERT, 0, nVertDifference, TRUE);
                else
                SetScrollRange(hWnd, SB_VERT, 0, 0, TRUE);
                SelectObject(hCompatibleDC, hOldBitmap);
                DeleteDC(hCompatibleDC);
                EndPaint(hWnd,&PaintStruct);
                return 0;
           case WM_VSCROLL:
                switch(LOWORD(wParam))
                {
                case SB_LINEDOWN:
                     if(nVertPosition < nVertDifference)
                     nVertPosition++;
                     break;
                case SB_LINEUP:
                     if(nVertPosition > 0)
                     nVertPosition--;
                     break;
                case SB_THUMBTRACK:
                     nVertPosition = HIWORD(wParam);
                     break;
                }
                SetScrollPos(hWnd, SB_VERT, nVertPosition, TRUE);
                InvalidateRect(hWnd, NULL, TRUE);
                return 0;
           case WM_HSCROLL:
                switch(LOWORD(wParam))
                {
                case SB_LINEDOWN:
                     if(nHorizPosition < nHorizDifference)
                     nHorizPosition++;
                     break;
                case SB_LINEUP:
                     if(nHorizPosition > 0)
                     nHorizPosition--;
                     break;
                case SB_THUMBTRACK:
                     nHorizPosition = HIWORD(wParam);
                     break;
                }
                SetScrollPos(hWnd, SB_HORZ, nHorizPosition, TRUE);
                InvalidateRect(hWnd, NULL, TRUE);
                return 0;
           case WM_DESTROY:
                DeleteObject(hBitmap);
                PostQuitMessage(0);
           }
    return DefWindowProc (hWnd, Message, wParam, lParam);
}

SetScrollRange(hWnd, SB_VERT, 0, 0, TRUE);

SetScrollRange(hWnd, SB_HORZ, 0, 0, TRUE);