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1. How To Create A Database In Access
2. How To Build A Database
3. How To Make A Database Website
4. Create A Database For Free
5. C++ Database Tutorial

• If you wanted to make this a bit more C rather than C you could use strings for the name of the worker and job, also you could use a vector, list or any other STL container that can dynamically resize to however many workers you want to create (or read in from the file if you want to add that feature).
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This walkthrough shows how to create a traditional Windows desktop application in Visual Studio. The example application you'll create uses the Windows API to display 'Hello, Windows desktop!' in a window. You can use the code that you develop in this walkthrough as a pattern to create other Windows desktop applications.

The Windows API (also known as the Win32 API, Windows Desktop API, and Windows Classic API) is a C-language-based framework for creating Windows applications. It has been in existence since the 1980s and has been used to create Windows applications for decades. More advanced and easier-to-program frameworks have been built on top of the Windows API. For example, MFC, ATL, the .NET frameworks. Even the most modern Windows Runtime code for UWP and Store apps written in C++/WinRT uses the Windows API underneath. For more information about the Windows API, see Windows API Index. There are many ways to create Windows applications, but the process above was the first.

Important

For the sake of brevity, some code statements are omitted in the text. The Build the code section at the end of this document shows the complete code.

Prerequisites

• A computer that runs Microsoft Windows 7 or later versions. We recommend Windows 10 for the best development experience.

• A copy of Visual Studio. For information on how to download and install Visual Studio, see Install Visual Studio. When you run the installer, make sure that the Desktop development with C++ workload is checked. Don't worry if you didn't install this workload when you installed Visual Studio. You can run the installer again and install it now.

• An understanding of the basics of using the Visual Studio IDE. If you've used Windows desktop apps before, you can probably keep up. For an introduction, see Visual Studio IDE feature tour.

• An understanding of enough of the fundamentals of the C++ language to follow along. Don't worry, we don't do anything too complicated.

Create a Windows desktop project

Follow these steps to create your first Windows desktop project. As you go, you'll enter the code for a working Windows desktop application. To see the documentation for your preferred version of Visual Studio, use the Version selector control. It's found at the top of the table of contents on this page.

To create a Windows desktop project in Visual Studio 2019

1. From the main menu, choose File > New > Project to open the Create a New Project dialog box.

2. At the top of the dialog, set Language to C++, set Platform to Windows, and set Project type to Desktop.

3. From the filtered list of project types, choose Windows Desktop Wizard then choose Next. In the next page, enter a name for the project, for example, DesktopApp.

4. Choose the Create button to create the project.

5. The Windows Desktop Project dialog now appears. Under Application type, select Desktop application (.exe). Under Additional options, select Empty project. Choose OK to create the project.

6. In Solution Explorer, right-click the DesktopApp project, choose Add, and then choose New Item.

7. In the Add New Item dialog box, select C++ File (.cpp). In the Name box, type a name for the file, for example, HelloWindowsDesktop.cpp. Choose Add.

Your project is now created and your source file is opened in the editor. To continue, skip ahead to Create the code.

To create a Windows desktop project in Visual Studio 2017

1. On the File menu, choose New and then choose Project.

2. In the New Project dialog box, in the left pane, expand Installed > Visual C++, then select Windows Desktop. In the middle pane, select Windows Desktop Wizard.

   In the Name box, type a name for the project, for example, DesktopApp. Choose OK.

3. In the Windows Desktop Project dialog, under Application type, select Windows application (.exe). Under Additional options, select Empty project. Make sure Precompiled Header isn't selected. Choose OK to create the project.

4. In Solution Explorer, right-click the DesktopApp project, choose Add, and then choose New Item.

5. In the Add New Item dialog box, select C++ File (.cpp). In the Name box, type a name for the file, for example, HelloWindowsDesktop.cpp. Choose Add.

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Your project is now created and your source file is opened in the editor. To continue, skip ahead to Create the code.

To create a Windows desktop project in Visual Studio 2015

1. On the File menu, choose New and then choose Project.

2. In the New Project dialog box, in the left pane, expand Installed > Templates > Visual C++, and then select Win32. In the middle pane, select Win32 Project.

   In the Name box, type a name for the project, for example, DesktopApp. Choose OK.

3. On the Overview page of the Win32 Application Wizard, choose Next.

4. On the Application Settings page, under Application type, select Windows application. Under Additional options, uncheck Precompiled header, then select Empty project. Choose Finish to create the project.

5. In Solution Explorer, right-click the DesktopApp project, choose Add, and then choose New Item.

6. In the Add New Item dialog box, select C++ File (.cpp). In the Name box, type a name for the file, for example, HelloWindowsDesktop.cpp. Choose Add.

Your project is now created and your source file is opened in the editor.

Create the code

Next, you'll learn how to create the code for a Windows desktop application in Visual Studio.

How To Create A Database In Access

To start a Windows desktop application

1. Just as every C application and C++ application must have a main function as its starting point, every Windows desktop application must have a WinMain function. WinMain has the following syntax.

   For information about the parameters and return value of this function, see WinMain entry point.

   Note

   What are all those extra words, such as CALLBACK, or HINSTANCE, or _In_? The traditional Windows API uses typedefs and preprocessor macros extensively to abstract away some of the details of types and platform-specific code, such as calling conventions, __declspec declarations, and compiler pragmas. In Visual Studio, you can use the IntelliSense Quick Info feature to see what these typedefs and macros define. Hover your mouse over the word of interest, or select it and press Ctrl+K, Ctrl+I for a small pop-up window that contains the definition. For more information, see Using IntelliSense. Parameters and return types often use SAL Annotations to help you catch programming errors. For more information, see Using SAL Annotations to Reduce C/C++ Code Defects.

2. Windows desktop programs require <windows.h>. <tchar.h> defines the TCHAR macro, which resolves ultimately to wchar_t if the UNICODE symbol is defined in your project, otherwise it resolves to char. If you always build with UNICODE enabled, you don't need TCHAR and can just use wchar_t directly.

3. Along with the WinMain function, every Windows desktop application must also have a window-procedure function. This function is typically named WndProc, but you can name it whatever you like. WndProc has the following syntax.

   In this function, you write code to handle messages that the application receives from Windows when events occur. For example, if a user chooses an OK button in your application, Windows will send a message to you and you can write code inside your WndProc function that does whatever work is appropriate. It's called handling an event. You only handle the events that are relevant for your application.

   For more information, see Window Procedures.

To add functionality to the WinMain function

1. In the WinMain function, you populate a structure of type WNDCLASSEX. The structure contains information about the window: the application icon, the background color of the window, the name to display in the title bar, among other things. Importantly, it contains a function pointer to your window procedure. The following example shows a typical WNDCLASSEX structure.

   For information about the fields of the structure above, see WNDCLASSEX.

2. Register the WNDCLASSEX with Windows so that it knows about your window and how to send messages to it. Use the RegisterClassEx function and pass the window class structure as an argument. The _T macro is used because we use the TCHAR type.

3. Now you can create a window. Use the CreateWindow function.

   This function returns an HWND, which is a handle to a window. A handle is somewhat like a pointer that Windows uses to keep track of open windows. For more information, see Windows Data Types.

4. At this point, the window has been created, but we still need to tell Windows to make it visible. That's what this code does:

   The displayed window doesn't have much content because you haven't yet implemented the WndProc function. In other words, the application isn't yet handling the messages that Windows is now sending to it.

5. To handle the messages, we first add a message loop to listen for the messages that Windows sends. When the application receives a message, this loop dispatches it to your WndProc function to be handled. The message loop resembles the following code.

   For more information about the structures and functions in the message loop, see MSG, GetMessage, TranslateMessage, and DispatchMessage.

   At this point, the WinMain function should resemble the following code.

To add functionality to the WndProc function

1. To enable the WndProc function to handle the messages that the application receives, implement a switch statement.

   One important message to handle is the WM_PAINT message. The application receives the WM_PAINT message when part of its displayed window must be updated. The event can occur when a user moves a window in front of your window, then moves it away again. Your application doesn't know when these events occur. Only Windows knows, so it notifies your app with a WM_PAINT message. When the window is first displayed, all of it must be updated.

   To handle a WM_PAINT message, first call BeginPaint, then handle all the logic to lay out the text, buttons, and other controls in the window, and then call EndPaint. For the application, the logic between the beginning call and the ending call is to display the string 'Hello, Windows desktop!' in the window. In the following code, notice that the TextOut function is used to display the string.

   HDC in the code is a handle to a device context, which is a data structure that Windows uses to enable your application to communicate with the graphics subsystem. The BeginPaint and EndPaint functions make your application behave like a good citizen and doesn't use the device context for longer than it needs to. The functions help make the graphics subsystem is available for use by other applications.

2. An application typically handles many other messages. For example, WM_CREATE when a window is first created, and WM_DESTROY when the window is closed. The following code shows a basic but complete WndProc function.

How To Build A Database

Build the code

As promised, here's the complete code for the working application.

To build this example

1. Delete any code you've entered in HelloWindowsDesktop.cpp in the editor. Copy this example code and then paste it into HelloWindowsDesktop.cpp:

2. On the Build menu, choose Build Solution. The results of the compilation should appear in the Output window in Visual Studio.

3. To run the application, press F5. A window that contains the text 'Hello, Windows desktop!' should appear in the upper-left corner of the display.

Congratulations! You've completed this walkthrough and built a traditional Windows desktop application.

See also

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You can use Visual Studio to create and update a local database file in SQL Server Express LocalDB. You can also create a database by executing Transact-SQL statements in the SQL Server Object Explorer tool window in Visual Studio. In this topic, we'll create an .mdf file and add tables and keys by using the Table Designer.

Prerequisites

To complete this walkthrough, you'll need the .NET desktop development and Data storage and processing workloads installed in Visual Studio. To install them, open Visual Studio Installer and choose Modify (or More > Modify) next to the version of Visual Studio you want to modify.

Create a project and a local database file

1. Create a new Windows Forms App project and name it SampleDatabaseWalkthrough.

2. On the menu bar, select Project > Add New Item.

3. In the list of item templates, scroll down and select Service-based Database.

4. Name the database SampleDatabase, and then click Add.

Add a data source

How To Make A Database Website

1. If the Data Sources window isn't open, open it by pressing Shift+Alt+D or selecting View > Other Windows > Data Sources on the menu bar.

2. In the Data Sources window, select Add New Data Source.

   The Data Source Configuration Wizard opens.

3. On the Choose a Data Source Type page, choose Database and then choose Next.

4. On the Choose a Database Model page, choose Next to accept the default (Dataset).

5. On the Choose Your Data Connection page, select the SampleDatabase.mdf file in the drop-down list, and then choose Next.

6. On the Save the Connection String to the Application Configuration File page, choose Next.

7. On the Choose your Database Objects page, you'll see a message that says the database doesn't contain any objects. Choose Finish.

View properties of the data connection

You can view the connection string for the SampleDatabase.mdf file by opening the Properties window of the data connection:

• Select View > SQL Server Object Explorer to open the SQL Server Object Explorer window. Expand (localdb)MSSQLLocalDB > Databases, and then right-click on SampleDatabase.mdf and select Properties.

• Alternatively, you can select View > Server Explorer, if that window isn't already open. Open the Properties window by expanding the Data Connections node, right-clicking on SampleDatabase.mdf, and then selecting Properties.

  Tip

  If you can't expand the Data Connections node, or the SampleDatabase.mdf connection is not listed, select the Connect to Database button in the Server Explorer toolbar. In the Add Connection dialog box, make sure that Microsoft SQL Server Database File is selected under Data source, and then browse to and select the SampleDatabase.mdf file. Finish adding the connection by selecting OK.

Create tables and keys by using Table Designer

In this section, you'll create two tables, a primary key in each table, and a few rows of sample data. You'll also create a foreign key to specify how records in one table correspond to records in the other table.

Create the Customers table

1. In Server Explorer, expand the Data Connections node, and then expand the SampleDatabase.mdf node.

   If you can't expand the Data Connections node, or the SampleDatabase.mdf connection is not listed, select the Connect to Database button in the Server Explorer toolbar. In the Add Connection dialog box, make sure that Microsoft SQL Server Database File is selected under Data source, and then browse to and select the SampleDatabase.mdf file. Finish adding the connection by selecting OK.

2. Right-click on Tables and select Add New Table.

   The Table Designer opens and shows a grid with one default row, which represents a single column in the table that you're creating. By adding rows to the grid, you'll add columns in the table.

3. In the grid, add a row for each of the following entries:

   Column name	Data type	Allow nulls
   CustomerID	nchar(5)	False (cleared)
   CompanyName	nvarchar(50)	False (cleared)
   ContactName	nvarchar (50)	True (selected)
   Phone	nvarchar (24)	True (selected)

4. Right-click on the CustomerID row, and then select Set Primary Key.

5. Right-click on the default row (Id), and then select Delete.

6. Name the Customers table by updating the first line in the script pane to match the following sample:

   You should see something like this:

7. In the upper-left corner of Table Designer, select Update.

8. In the Preview Database Updates dialog box, select Update Database.

   The Customers table is created in the local database file.

Create the Orders table

1. Add another table, and then add a row for each entry in the following table:

   Column name	Data type	Allow nulls
   OrderID	int	False (cleared)
   CustomerID	nchar(5)	False (cleared)
   OrderDate	datetime	True (selected)
   OrderQuantity	int	True (selected)

2. Set OrderID as the primary key, and then delete the default row.

3. Name the Orders table by updating the first line in the script pane to match the following sample:

4. In the upper-left corner of the Table Designer, select Update.

5. In the Preview Database Updates dialog box, select Update Database.

   The Orders table is created in the local database file. If you expand the Tables node in Server Explorer, you see the two tables:

Create a foreign key

1. In the context pane on the right side of the Table Designer grid for the Orders table, right-click on Foreign Keys and select Add New Foreign Key.

2. In the text box that appears, replace the text ToTable with Customers.

3. In the T-SQL pane, update the last line to match the following sample:

4. In the upper-left corner of the Table Designer, select Update.

5. In the Preview Database Updates dialog box, select Update Database.

   The foreign key is created.

Populate the tables with data

Create A Database For Free

1. In Server Explorer or SQL Server Object Explorer, expand the node for the sample database.

2. Open the shortcut menu for the Tables node, select Refresh, and then expand the Tables node.

3. Open the shortcut menu for the Customers table, and then select Show Table Data.

4. Add whatever data you want for some customers.

   You can specify any five characters you want as the customer IDs, but choose at least one that you can remember for use later in this procedure.

5. Open the shortcut menu for the Orders table, and then select Show Table Data.

6. Add data for some orders.

   Important

   Make sure that all order IDs and order quantities are integers and that each customer ID matches a value that you specified in the CustomerID column of the Customers table.

7. On the menu bar, select File > Save All.

C++ Database Tutorial

See also