PRB: DAO References Not Enabled When Porting an Older VB App

ID: Q130646

The information in this article applies to:

Microsoft Visual Basic Standard, Professional, and Enterprise Editions, 16-bit and 32-bit, for Windows, version 4.0

SYMPTOMS

A reference to any database object or method in a Visual Basic program generates the error:

User-defined type not defined

This error often occurs when loading your first Visual Basic version 3.0 program into Visual Basic version 4.0.

CAUSE

When you load your first Visual Basic version 3.0 project, a dialog box asks you:

Would you like Visual Basic to add this library reference now?

If you selected the "No for All Older Projects" button, an entry was made in your VB.INI file that says AutoReferenceDAO=1. If you remove this line, you will see the dialog box again and be able to add needed Visual Basic 3.0 project references automatically.

RESOLUTION

For the current project, choose References from the Tools menu, and select the Microsoft DAO 2.5/3.0 Compatiblity Library check box. This enables compatibility with the older syntax found in Visual Basic version 3.0 programs. Microsoft reccommends that you upgrade the syntax in your programs to the new DAO 3.0 syntax used in Visual Basic version 4.0, replacing the DAO 2.5/3.0 with the DAO 3.0.

STATUS

This behavior is by design.

Additional query words: 4.00 2.50 3.00 vb4win vb4all

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