How to use ODBC in an ActiveX control by using Visual C++
Article ID: 152534
Article Last Modified on 9/30/2005
APPLIES TO
- Microsoft Foundation Class Library 4.2, when used with:
- Microsoft Visual C++ 4.0 Standard Edition
- Microsoft Visual C++ 4.1 Subscription
- Microsoft Visual C++ 5.0 Enterprise Edition
- Microsoft Visual C++ 5.0 Professional Edition
- Microsoft Visual C++ 6.0 Enterprise Edition
- Microsoft Visual C++ 6.0 Professional Edition
- Microsoft Visual C++ 6.0 Standard Edition
- Microsoft Data Access Components 2.5
- Microsoft Data Access Components 2.6
- Microsoft Data Access Components 2.7
This article was previously published under Q152534
SUMMARY
DBCTL demonstrates a way to use ODBC in an ActiveX Control
(OLE Control). A Visual C++ and a Visual Basic client application are included
as part of this sample. The Visual C++ client is called DBUSR, the Visual Basic
client is called DBVBUSR.
The following file is available for download from the Microsoft
Download Center:
For more 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
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
Notes- Use the -d option when running DBCTL.EXE to decompress the
file and recreate the proper directory structure.
- To make the DBCTL sample compile in Microsoft Visual C++ 6.0, you
will have to either remove the "_UNICODE" preprocessor directive in the project
settings or include the "afxdb.h" header file in DBCtlSet.h.
MORE INFORMATION
DBCTL creates and opens a Class Wizard-configured
CRecordset object from within the virtual override of
COleControl::OnSetClientSite. The CRecordset- derived object is configured to
the COURSE table of the STDREG32.MDB that comes with the sample. Please note
that you have to create a user or a system DSN called "student registration" in
your ODBC control panel with Access ODBC Driver and have to point this DSN to
the STDREG32.MDB file.
The CRecordset-derived object is closed from
within its own destructor. The CRecordset object is destructed with a call to
the delete operator from within the COleControl derived class
destructor.
The control exposes one method, a DisplayRecords method,
that simply lists the contents of the recordset in the control.
The
OLE Control subclasses a listbox. The string items are added to the listbox by
using SendMessage.
The DBUSR.EXE and DBVBUSR.EXE demonstrate using
the custom control.
Additional query words: Dbctl
Keywords: kbdownload kbdatabase kbprogramming kbfile kbsample KB152534