This article was previously published under Q181733
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The Adovcbtd.exe sample demonstrates CancelBatch, UpdateBatch, AddNew,Delete, Move, and other ActiveX Data Objects (ADO) Recordset methods usingsmart pointers and #import. Using #import is the preferred way for VisualC++ programmers to use ADO.
The program is written and designed to demonstrate how to get started withADO via #import.
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The sample undefines EOF in Stdafx.h to prevent a conflict. The followingthree lines are from the Stdafx.h file:
#undef EOF #import <Msado15.dll> rename_namespace("ado15") // Please see the #import Directive help in InfoViewer rename_namespace("ado15")
Msado15.dll has to be located on the same drive as the Windows Systemdirectory, and in a path \program files\common files\system\ado. You canconfigure Visual C++ to use this path to search for the ADO .dll,eliminating the need to specify the explicit path within your #importstatement, just as you would configure the location of header files used by
#include. The sample renames the namespace to prevent collisions with other
The sample shows what ADO capabilities are supported by the driver and alsouses a Microsoft Access database. However, you can replace it withother data sources in the code.
With certain combinations of Delete/Add New/Next/Prev, it is possible toget an OLE error. The code is provided as a sample only and is not forproduction purposes.
NOTE: You cannot pass a connection object in the recordset Open methodin ADO version 1.5. You must use the PutRefActiveConnection method. Thisdiffers from ADO 1.0 and Visual Basic (VB). The following code shows how to open a recordset using an ODBC Data Source Name (DSN). The sample file opens the recordset using an alternate (DSN-less) method. Note that error checking has been omitted for clarity in the code given below, but isincluded in the sample file.
For additional information about running the sample file, please refer tothe Readme.txt file included with the sample.
For additional information on using ADO with #import, please see thefollowing articles in the Microsoft Knowledge Base:For additional information184968, click the article numberFILE: Adovcsp.exe Demonstrates Using Stored Procedures with ADO below to view the articleFILE: Adovcsp.exe Demonstrates Using Stored Procedures with ADO in the Microsoft Knowledge Base: