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Setting up an ADO project and writing ADO code is similar whether you use Visual Basic or Visual Basic for Applications. This topic addresses using ADO with both Visual Basic and Visual Basic for Applications and notes any differences.
Object library references for Excel VBA to access Access database. Microsoft ActiveX Data Objects 2.8 Library. Microsoft ActiveX Data Objects 6.1 Library.
Referencing the ADO Library
The ADO library must be referenced by your project.
ADOX is a companion library to the core ADO objects. It exposes additional objects for creating, modifying, and deleting schema objects, such as tables and procedures. It also includes security objects to maintain users and groups and to grant and revoke permissions on objects. Microsoft ActiveX Data Objects (ADO) enable your client applications to access and manipulate data from a variety of sources through an OLE DB provider. Its primary benefits are ease of use, high speed, low memory overhead, and a small disk footprint. ADO supports key features for building client/server and Web-based applications. Select Microsoft ActiveX Data Objects x.x Library from the list. Verify that at least the following libraries are also selected: Visual Basic for Applications. Microsoft Access 8.0 Object Library (or later) Microsoft DAO 3.5 Object Library (or later) Click OK. Creating ADO Objects in Visual Basic. Mar 04, 2020 Allow Automatic prompting for ActiveX controls by selecting Enable. Allow Internet Explorer to Display video and animation on a webpage that doesn't use external media player by selecting Enable. Allow Internet Explorer to Download signed ActiveX controls by selecting Enable, or Prompt if you want to be notified each time this happens.
To reference ADO from Microsoft Visual Basic
- In Visual Basic, from the Project menu, select References...
- Select Microsoft ActiveX Data Objects x.x Library from the list. Verify that at least the following libraries are also selected:
- Visual Basic for Applications
- Visual Basic runtime objects and procedures
- Visual Basic objects and procedures
- OLE Automation
- Click OK.
You can use ADO just as easily with Visual Basic for Applications, by using Microsoft Access, for example.
To reference ADO from Microsoft Access
- In Microsoft Access, select or create a module from the Modules tab in the Database window.
- https://moonever457.weebly.com/blog/microsoft-hyperlapse-pro-for-mac-license. On the Tools menu, select References...
- Select Microsoft ActiveX Data Objects x.x Library from the list. https://moonever457.weebly.com/microsoft-sculpt-mouse-on-mac-os.html. Verify that at least the following libraries are also selected:
- Visual Basic for Applications
- Microsoft Access 8.0 Object Library (or later)
- Microsoft DAO 3.5 Object Library (or later)
- Click OK.
Creating ADO Objects in Visual Basic
To create an automation variable and an instance of an object for that variable, you can use two methods: Dim or CreateObject.
Dim
You can use the New keyword with Dim to declare and create instances of ADO objects in one step:
Alternatively, the Dim statement declaration and object instantiation can also be two steps:
Note
It is not required to explicitly use the
ADODB
progid with the Dim statement, assuming you have correctly referenced the ADO library in your project. However, using it ensures that you will not have naming conflicts with other libraries.Note
For example, if you include references to both ADO and DAO in the same project, you should include a qualifier to specify which object model to use when instantiating Recordset objects, as in the following code:
CreateObject
With the CreateObject method, the declaration and object instantiation must be two discrete steps:
Activex Object Install
Objects instantiated with CreateObject are late-bound, which means that they are not strongly typed and command-line completion is disabled. However, it does allow you to skip referencing the ADO library from your project, and enables you to instantiate specific versions of objects. For example:
You could also accomplish this by specifically creating a reference to the ADO version 2.0 type library and creating the object.
Instantiating objects by using the CreateObject method is typically slower than using the Dim statement.
Handling Events
In order to handle ADO events in Microsoft Visual Basic, you must declare a module-level variable using the WithEvents keyword. The variable can be declared only as part of a class module and must be declared at the module level. For a more thorough discussion of handling ADO events, see Handling ADO Events.
Visual Basic Examples
Many Visual Basic examples are included with the ADO documentation. For more information, see ADO Code Examples in Microsoft Visual Basic.
See Also
Microsoft Activex Data Objects 2.8 Library
-->Microsoft Activex Data Objects Library For Mac Download
This documentation provides an overview of how to use ADO objects to work with data from various data sources. First, the introduction summarizes the new features and the requirement for installing, using, and redistributing the ADO component. The next sections discuss the use of the various types of ADO objects. Finally, the appendixes discuss various Microsoft-supplied data and service providers, error messages, and tips about how to use ADO in several programming languages, in addition to samples and a glossary.
This section contains the following topics.