Microsoft KB Archive/172403
Article ID: 172403
Article Last Modified on 3/2/2005
- Microsoft ActiveX Data Objects 1.5
- Microsoft ActiveX Data Objects 2.0
- Microsoft ActiveX Data Objects 2.1 Service Pack 2
- Microsoft ActiveX Data Objects 2.5
- Microsoft ActiveX Data Objects 2.6
- Microsoft ActiveX Data Objects 2.7
- Microsoft Visual Basic 5.0 Professional Edition
- Microsoft Visual Basic 6.0 Professional Edition
This article was previously published under Q172403
For a Microsoft Visual Basic .NET version of this article, see 308656.
Adovb.exe is a self-extracting compressed file containing sample code that demonstrates how to use ActiveX Data Objects (ADO) within Visual Basic.
The following file is available for download from the Microsoft Download Center:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
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What Adovb Demonstrates
Adovb demonstrates proper use of output and return parameters (for SQL Server), and opening a parameterized recordset for both a Microsoft Access and SQL Server data sources. Also included is a generic template for error handling with ADO code:
Private Sub cmdTemplate_Click() Dim Conn1 As adodb.Connection On Error GoTo VbError ' Trap (non-ADO) error/exceptions ' Create Connection Object (using early binding) Set Conn1 = new ADODB.Connection On Error GoTo AdoError ' Trap any error/exception Conn1.ConnectionString = AccessConnect Conn1.Open '---------------------- ' YOUR CODE GOES HERE! '---------------------- ' Successful Shutdown Conn1.Close Done: ' Miscellaneous (graceful) Cleanup On Error Resume Next Set Conn1 = Nothing Exit Sub ' ADO Error/Exception Handler AdoError: ' Save Error Information! ErrNumber = Err.Number ErrSource = Err.Source ErrDescription = Err.Description AdoErrorEx List1, Conn1 ' Non-ADO Native error/exception handler VbError: VbErrorEx List1, ErrNumber, ErrSource, ErrDescription GoTo Done End Sub
- When using ADOVB with ADO 2.0 or later, you should remove the Reference to Microsoft OLE DB ActiveX Data Objects 1.0, and set a Reference to the latest version of Microsoft ActiveX Data Objects available.
When using ADO 2.0 or later, referencing the OriginalValue property of an ADO Field object will give the following error, if the LockType of the ADO Recordset is Read Only:
To avoid this error in ADOVB, comment out or remove the following line of code, in the Click event procedure for cmdAccess in the code window for frmADOVB:
List1.AddItem vbTab & "OriginalValue= " & rs1.Fields(i).OriginalValue
About the ADO* Series of Samples
This is one of several identical samples implemented using ADO within various products, as listed below. The advantage is that these articles have an identical interface/functionality, demonstrating both the similarities and differences in using ADO with different languages / mechanisms:
172403 FILE: Adovb.exe Demonstrates How to Use ADO with Visual Basic
220152 Sample: ADOVC1 Simple ADO/VC++ Application
185033 FILE: Adoacc.exe Demonstrates Using ADO with Access 97
Additional query words: AdoVB
Keywords: kbinfo kbdownload kbstoredproc kbdatabase kbfile kbsample kbcode KB172403