Помогите с задачей по с++

 #if defined(UNICODE) && !defined(_UNICODE) 
    #define _UNICODE 
#elif defined(_UNICODE) && !defined(UNICODE) 
    #define UNICODE 
#endif 
 
#include  
#include  
#include  
 
/*  Declare Windows procedure  */ 
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM); 
 
/*  Make the class name into a global variable  */ 
TCHAR szClassName[ ] = _T("CodeBlocksWindowsApp"); 

 int WINAPI WinMain (HINSTANCE hThisInstance, 
                     HINSTANCE hPrevInstance, 
                     LPSTR lpszArgument, 
                     int nCmdShow) 
{ 
    HWND hwnd;               /* This is the handle for our window */ 
    MSG messages;            /* Here messages to the application are saved */ 
    WNDCLASSEX wincl;        /* Data structure 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;                 /* Catch double-clicks */ 
    wincl.cbSize = sizeof (WNDCLASSEX); 
 

     /* Use default icon and mouse-pointer */ 
    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 Windows's default colour as the background of the window */ 
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND; 
 
    /* Register the window class, and if it fails quit the program */ 
    if (!RegisterClassEx (&wincl)) 
        return 0; 

     /* The class is registered, let's create the program*/ 
    hwnd = CreateWindowEx ( 
           0,                   /* Extended possibilites for variation */ 
           szClassName,         /* Classname */ 
           _T("Code::Blocks Template Windows App"),       /* Title Text */ 
           WS_OVERLAPPEDWINDOW, /* default window */ 
           CW_USEDEFAULT,       /* Windows decides the position */ 
           CW_USEDEFAULT,       /* where the window ends up on the screen */ 
           544,                 /* The programs width */ 

            375,                 /* and height in pixels */ 
           HWND_DESKTOP,        /* The window is a child-window to desktop */ 
           NULL,                /* No menu */ 
           hThisInstance,       /* Program Instance handler */ 
           NULL                 /* No Window Creation data */ 
           ); 
 
    /* Make the window visible on the screen */ 
    ShowWindow (hwnd, nCmdShow); 
 
    /* Run the message loop. It will run until GetMessage() returns 0 */ 
    while (GetMessage (&messages, NULL, 0, 0)) 
    { 
        /* Translate virtual-key messages into character messages */ 
        TranslateMessage(&messages); 
        /* Send message to WindowProcedure */ 
        DispatchMessage(&messages); 
    } 

     /* The program return-value is 0 - The value that PostQuitMessage() gave */ 
    return messages.wParam; 
} 
 
 
/*  This function is called by the Windows function DispatchMessage()  */ 

 LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) 
{ 
    PAINTSTRUCT ps; 
   HDC hdc; 
   TCHAR greeting[] = _T("Hello, Windows desktop!"); 
 
         // Initialize a LOGBRUSH structure. 
 
    RECT clientRect; 
    RECT textRect; 
    HRGN bgRgn; 
    HBRUSH hBrush; 
    HPEN hPen; 
 
    switch (message)                  /* handle the messages */ 
    { 
        case WM_PAINT: 
      hdc = BeginPaint(hwnd, &ps); 
 
      // Here your application is laid out. 
      // For this introduction, we just print out "Hello, Windows desktop!" 
      // in the top left corner. 
      TextOut(hdc, 
         5, 5, 
         greeting, _tcslen(greeting)); 
      // End application specific layout section. 

         GetClientRect(hwnd, &clientRect); 
        bgRgn = CreateRectRgnIndirect(&clientRect); 
        hBrush = CreateSolidBrush(RGB(200,200,200)); 
        FillRgn(hdc, bgRgn, hBrush); 
 
        hPen = CreatePen(PS_DOT,1,RGB(0,255,0)); 
        SelectObject(hdc, hPen); 
        SetBkColor(hdc, RGB(0,0,0)); 
        Rectangle(hdc, 10,10,200,200); 

         SetBkColor(hdc, RGB(255,255,255)); 
        SetRect(&textRect, 10, 210, 200,200); 
        DrawText(hdc,TEXT("PS_DOT"),-1,&textRect, DT_CENTER | DT_NOCLIP); 
 
        hPen = CreatePen(PS_DASHDOTDOT,1,RGB(0,255,255)); 
        SelectObject(hdc, hPen); 
        SetBkColor(hdc, RGB(255,0,0)); 
        SelectObject(hdc,CreateSolidBrush(RGB(0,0,0))); 
        Rectangle(hdc, 210,10,400,200); 

         SetBkColor(hdc, RGB(255,200,200)); 
        SetRect(&textRect, 210, 210, 400,200); 
        DrawText(hdc,TEXT("PS_DASHDOTDOT"),-1,&textRect, DT_CENTER | DT_NOCLIP); 
 
        hPen = CreatePen(PS_DASHDOT,1,RGB(255,0,0)); 
        SelectObject(hdc, hPen); 
        SetBkColor(hdc, RGB(255,255,0)); 
        SelectObject(hdc,CreateSolidBrush(RGB(100,200,255))); 
        Rectangle(hdc, 410,10,600,200); 

         SetBkColor(hdc, RGB(200,255,200)); 
        SetRect(&textRect, 410, 210, 600,200); 
        DrawText(hdc,TEXT("PS_DASHDOT"),-1,&textRect, DT_CENTER | DT_NOCLIP); 

         hPen = CreatePen(PS_SOLID,5,RGB(255,0,0)); 
        SelectObject(hdc, hPen); 
        // Setting the background color doesn't matter 
        // when the style is PS_SOLID 
        SetBkColor(hdc, RGB(255,255,255)); 
        SelectObject(hdc,CreateSolidBrush(RGB(200,100,50))); 
        Rectangle(hdc, 10,300,200,500); 
 
        // Text caption 
        SetBkColor(hdc, RGB(200,200,255)); 
        SetRect(&textRect, 10, 510, 200,500); 
        DrawText(hdc,TEXT("PS_SOLID"),-1,&textRect, DT_CENTER | DT_NOCLIP); 
 
        hPen = CreatePen(PS_DASH,1,RGB(0,255,0)); 
        SelectObject(hdc, hPen); 
        SetBkColor(hdc, RGB(0,0,0)); 
        SelectObject(hdc,CreateSolidBrush(RGB(200,200,255))); 
        Rectangle(hdc, 210,300,400,500); 

         // Text caption 
        SetBkColor(hdc, RGB(255,255,200)); 
        SetRect(&textRect, 210, 510, 400,200); 
        DrawText(hdc,TEXT("PS_DASH"),-1,&textRect, DT_CENTER | DT_NOCLIP); 
 
        hPen = CreatePen(PS_NULL,1,RGB(0,255,0)); 
        SelectObject(hdc, hPen); 
        // Setting the background color doesn't matter 
        // when the style is PS_NULL 
        SetBkColor(hdc, RGB(0,0,0)); 
        SelectObject(hdc,CreateSolidBrush(RGB(255,255,255))); 
        Rectangle(hdc, 410,300,600,500); 
 
        // Text caption 
        SetBkColor(hdc, RGB(200,255,255)); 
        SetRect(&textRect, 410, 510, 600,500); 
        DrawText(hdc,TEXT("PS_NULL"),-1,&textRect, DT_CENTER | DT_NOCLIP); 

         // Clean up 
        DeleteObject(bgRgn); 
        DeleteObject(hBrush); 
        DeleteObject(hPen); 
 
        GetStockObject(WHITE_BRUSH); 
        GetStockObject(DC_PEN); 
 
/////////////////////////////////// 
 
      EndPaint(hwnd, &ps); 
      break; 
        case WM_DESTROY: 
            PostQuitMessage (0);       /* send a WM_QUIT to the message queue */ 
            break; 
        default:                      /* for messages that we don't deal with */ 
            return DefWindowProc (hwnd, message, wParam, lParam); 
    } 
 
    return 0; 
}