PACMAN_DESKTOP

#include <windows.h>

#define DTime 10
#define DTimeMouve 100
#define TaileIcon 32
HINSTANCE hInst;
HWND hWndDesktop;

HICON     hIcon[5][4];
HICON     hPiece;
POINT     ptIcon= { 0,  0};
POINT     ptPiece={200,200};
int*      iTableau;
HDC       hDC;
int       iPoseIcon=0;
bool      bMouve=0;
int       iMouve=0;
bool      bClikG=0,bTour=0;
HWND FindDesktopWindow(void)
{
    HWND hWnd = FindWindow("Progman", "Program Manager");

    if(GetParent(hWnd) == NULL)
    { 
        HWND hWndEnfant = GetWindow(hWnd, GW_CHILD);
        char szBuf[32];

        while(hWndEnfant != NULL)
        {
            GetClassName(hWndEnfant, szBuf, sizeof(szBuf));
            if(lstrcmp(szBuf, "SHELLDLL_DefView") == 0) break;
            hWndEnfant = GetWindow(hWndEnfant, GW_HWNDNEXT);
        }
        if(hWndEnfant != NULL)
        {
            hWndEnfant = GetWindow(hWndEnfant, GW_CHILD);
            while(hWndEnfant != NULL)
            {
                GetClassName(hWndEnfant, szBuf, sizeof(szBuf));
                if(lstrcmp(szBuf, "SysListView32") == 0) break;
                hWndEnfant = GetWindow(hWndEnfant, GW_HWNDNEXT);
            }
            if(hWndEnfant != NULL) return hWndEnfant; 
        }
    }
    return GetDesktopWindow(); 
}
void EffaceIcon(HWND hWnd,POINT &p)
{
    RECT r;

    r.right  = (r.left = p.x) + TaileIcon;
    r.bottom = (r.top  = p.y) + TaileIcon;
    InvalidateRect(hWnd, &r, true);
    UpdateWindow(hWnd);
}
void DessineIcon(HDC hDC,POINT p,HICON hIcone)
{
    
    DrawIcon(hDC,  p.x,  p.y, hIcone);
    DestroyIcon(hIcone);
}

void DeplaceIcon()
{
    if(ptIcon.x!=ptPiece.x)
    {
        if(ptIcon.x<ptPiece.x)
        {
            iPoseIcon=0;
            ptIcon.x++;
        }
        else
        {
            iPoseIcon=1;
            ptIcon.x--;
        }
    }
    else
    {
        if(ptIcon.y!=ptPiece.y)
        {
            if(ptIcon.y<ptPiece.y)
            {
                iPoseIcon=3;
                ptIcon.y++;
            }
            else
            {
                iPoseIcon=2;
                ptIcon.y--;
            }
        }
    }
    if(ptIcon.y==ptPiece.y&&ptIcon.x==ptPiece.x)
    {
        EffaceIcon(hWndDesktop,ptPiece);
        ptPiece.x=rand()%(GetSystemMetrics(SM_CXSCREEN) - 32);
        ptPiece.y=rand()%(GetSystemMetrics(SM_CYSCREEN) - 64);
        
    }
}

void CALLBACK TimerProc(HWND hWnd, UINT uMsg, UINT uTimerId, DWORD dwTime)
{
   
   DeplaceIcon();
   EffaceIcon(hWndDesktop,ptIcon);
   if(HIBYTE(GetAsyncKeyState(VK_ESCAPE)))
    {
      if(hWndDesktop == GetFocus())
        {
             PostQuitMessage (0);
        }
    }
     
     if(HIBYTE(GetAsyncKeyState(VK_LBUTTON)))
    {
      if(hWndDesktop == GetFocus())
      {
        bClikG=1;
        bTour=1;
        EffaceIcon(hWndDesktop,ptPiece);
        GetCursorPos(&ptPiece);
        ptPiece.x -= 16;
        ptPiece.y -= 32;
        
      }
    }  
    if(bClikG&&!bTour)
    {
        bClikG=0;
        InvalidateRect(hWndDesktop,0,TRUE);
    }
    bTour=0;
     EffaceIcon(hWndDesktop,ptIcon);
    if(hDC = GetDC(hWndDesktop))
    {
      DessineIcon(hDC,ptIcon ,hIcon[iPoseIcon][iMouve]);
      DessineIcon(hDC,ptPiece,hPiece);
      ReleaseDC(hWndDesktop, hDC);
    }   
       
}
void CALLBACK TimerMove(HWND hWnd, UINT uMsg, UINT uTimerId, DWORD dwTime)
{
    if(!bMouve)
    {
        if(iMouve++==2)
        bMouve=true;
    }
    else
    {
        if(iMouve--==0)
        bMouve=false;
    }
}
    
int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nFunsterStil)

{
    MSG messages;
    DWORD dwPid;
    
    char cBuffer[7];
    hInst = hThisInstance;
    hWndDesktop=FindDesktopWindow(); 
    
    dwPid = GetWindowThreadProcessId(hWndDesktop, NULL);    
    if(!AttachThreadInput(dwPid, GetCurrentThreadId(), TRUE))
    return 0; 
    
   if(!(hPiece = LoadIcon(hInst, "Icon12")))
           return 0;
    
    for(int j=0;j<=3;j++)
    {
        for(int i = 0; i <= 2; i++)
        {
            wsprintf(cBuffer, "Icon%d",i+(j*3));
            if(!(hIcon[j][i] = LoadIcon(hInst, cBuffer)))
            return 0;
        }
    }
        
    
    srand((UINT)GetTickCount());     
    if(hDC = GetDC(hWndDesktop))
        {
            DessineIcon(hDC,ptPiece,hPiece);
            ReleaseDC(hWndDesktop, hDC);
        } 
    SetTimer(NULL, 1, DTime, TimerProc);
    SetTimer(NULL, 2, DTimeMouve, TimerMove);
    while (GetMessage (&messages, NULL, 0, 0))
    {
        TranslateMessage(&messages);
        DispatchMessage(&messages);
    }
    
    AttachThreadInput(dwPid, GetCurrentThreadId(), FALSE);    
    KillTimer(NULL, 1);
    KillTimer(NULL, 2);
    InvalidateRect(hWndDesktop, 0, TRUE);
    return messages.wParam;
}