C / C++ / MFC

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	static RECT rcBmp;
	static HDC hdcCompat;
	static HBITMAP hbmp;
	static RECT rc;
	static RECT rc2;
	static RECT rc3;
	static RECT rc4;
	HBRUSH hbrWhite, hbrGray; 
	const COLORREF SomeColor = RGB(255,255,255);
	const COLORREF SomeColor2 = RGB(0,0,1);
	hbrWhite = CreateSolidBrush(SomeColor); 
	hbrGray  = CreateSolidBrush(SomeColor2); 
	
	int y = 0;
	HDC hdc = (HDC) wParam; 
	

    switch (uMsg)
    {
		case WM_CREATE: 
		
		return 0L; 
 
case WM_ERASEBKGND: 
    
    GetClientRect(hwnd, &rc); 
    SetMapMode(hdc, MM_ANISOTROPIC); 
    SetWindowExtEx(hdc, 100, 100, NULL); 
    SetViewportExtEx(hdc, rc.right, rc.bottom, NULL); 
    FillRect(hdc, &rc, hbrWhite); 
	
    
       
       
    return 0;
  
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
	
		
           
    case WM_PAINT:
        {
            PAINTSTRUCT ps;
			
            HDC hdc = BeginPaint(hwnd, &ps);

            

           
			 SetRect(&rc,x, 20, 40, 40); 
			FillRect(hdc, &rc, hbrGray); 
			SetRect(&rc2,60, 60, 80, 80); 
			FillRect(hdc, &rc2, hbrGray); 

            EndPaint(hwnd, &ps);
        }
        return 0;

    }
    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
void GameUpdate()
{
	 
	x = x +1;

}

case WM_CREATE:
		{
			// Create a file mapped object.
			//.............................
			hMapFile = CreateFileMapping( (HANDLE)0xFFFFFFFF, NULL,
				                          PAGE_READWRITE, 
										  0,
										  1024,
										  "MyFileMappingObject" );

			// Return if the mapping failed.
			//..............................
			if ( !hMapFile )
				return(-1);
		}
		break;

DWORD AnotherProcess( LPDWORD lpdwParam )
{
	HANDLE hFileMap;
	LPTSTR lpMapAddress;

	// Open the file mapping.
	//.......................
	hFileMap = OpenFileMapping( FILE_MAP_ALL_ACCESS, FALSE,
		                        "MyFileMappingObject" );

	// Map a view to the mapping object.
	//..................................
	lpMapAddress =(LPTSTR)MapViewOfFileEx( hFileMap, FILE_MAP_ALL_ACCESS,
		                            0, 0, 0, lpdwParam );

	// Display the contents of the memory.
	//....................................
	MessageBox( NULL, lpMapAddress, "Mapped Memmory",
		        MB_OK | MB_ICONINFORMATION );

	// Set "Received" into the memory.
	//................................
	strcpy( lpMapAddress, "Received" );

	UnmapViewOfFile( lpMapAddress );

	return( 0 );
}

case IDM_TEST:
			{   
				DWORD dwID;
				// Map a view of the file mapped object.
				//......................................
				lpMapAddress = (LPTSTR)MapViewOfFile( hMapFile, 
					                          FILE_MAP_ALL_ACCESS,
											  0, 0, 0 );

				// Place data int the view.
				//.........................
				strcpy(lpMapAddress, "Data passed from main process.");

				// Make sure the data is flushed to the file.
				//...........................................
				FlushViewOfFile( lpMapAddress, 
					             lstrlen( lpMapAddress ) );

				// Create a thread to receive the data.
				//.....................................
				hThread = CreateThread( NULL, 0, 
					      (LPTHREAD_START_ROUTINE)AnotherProcess, 
						  lpMapAddress, 0, &dwID);

				// Set a timer to wait for the data to be processed.
				//..................................................
				SetTimer( hWnd, 1,	1000, NULL );
			}
			break;

case WM_TIMER:
		{
			// Check to see if the thread has processed the memory.
			//.....................................................
			if ( strcmp( lpMapAddress, "Received" ) == 0 )
			{
				// Kill the timer and thread.
				//...........................
				KillTimer( hWnd, 1 );
				TerminateThread( hThread, 0 );

				MessageBox( hWnd, lpMapAddress, "Done", MB_OK );

				UnmapViewOfFile( lpMapAddress );

			}

#define EVENBYTE( i )  ((i+7)/8*8)

int    nIconBytes = (EVENBYTE(nWidth)/8)*nHeight;

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPWSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    // TODO: Place code here.

    CDatabase* pExcelDatabase = NULL;//Pointer to database
    CString csExcelFile = _T("D:\\ExcelFile.xlsx");
    CString csDSN;
    //check for file existence
    if (TRUE == ::PathFileExists(csExcelFile))// checks whether the file exists or not
    {
        csDSN.Format(_T("DRIVER=Microsoft Excel Driver (*.xls,*.xlsx);DSN='';DBQ=%s"), (LPCTSTR)csExcelFile);
    }
    else
    {
        return NULL;
    }

    //Create the database
    pExcelDatabase = new CDatabase();
    HRESULT hr;
    try // to handle exceptions on opening database
    {
        hr = pExcelDatabase->OpenEx(csDSN, CDatabase::noOdbcDialog);//open the database
    }
    catch (...)
    {
        if (pExcelDatabase)
        {
            delete pExcelDatabase;
        }
        return NULL;
    }
    // Initialize global strings
    LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadStringW(hInstance, IDC_WINDOWSPROJECT1, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);

    // Perform application initialization:
    if (!InitInstance (hInstance, nCmdShow))
    {
        return FALSE;
    }

    HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WINDOWSPROJECT1));

    MSG msg;

    // Main message loop:
    while (GetMessage(&msg, nullptr, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int) msg.wParam;
}