Q184609: PRB: Compile Error: User-Defined Type Not Defined

Article: Q184609
Product(s): Microsoft Visual Basic for Windows
Version(s): 2.0,2.1 SP2,2.5,2.6,5.0,6.0
Operating System(s): 
Keyword(s): kbVBp500 kbVBp600 kbGrpDSVBDB kbGrpDSMDAC kbDSupport kbADO210sp2 kbMDAC210SP2 kbATM kbm
Last Modified: 23-AUG-2001

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The information in this article applies to:

- Microsoft Visual Basic Enterprise Edition for Windows, versions 5.0, 6.0 
- ActiveX Data Objects (ADO), versions 2.0, 2.1 SP2, 2.5, 2.6, 2.7 
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SYMPTOMS
========

When you compile your ADO project, you receive the following error:

  Compile error: User-defined type not defined

This can occur on either a Connection or Command object.

CAUSE
=====

You may have referenced one of the following libraries instead of the Microsoft
ActiveX Data Objects (ADODB) type library:

- Microsoft ActiveX Data Objects Recordset (ADOR) type library.

  -or-

- Microsoft ActiveX Data Objects (Multi-dimensional) (ADOMD) type library.

RESOLUTION
==========

Remove the incorrect type library reference from your project, and add a
reference to the correct type library.

STATUS
======

This behavior is by design.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Create a new project and add a command button (Command1) to a form.

2. Add a reference to the Microsoft ActiveX Data Objects Recordset Library.

3. Add the following code to the form:

     Private Sub Command1_Click()
     Dim cn As ADODB.Connection
     End Sub

4. Run the project and click the command button. The error appears.

5. Remove the reference, and add a reference to the Microsoft ActiveX Data
  Objects Library.

6. Click the command button. The error does not appear.

NOTE:

- Microsoft Access users will have to use ADODB.Connection to avoid confusion
  with the DAO Connection object.

- If the Intellitype feature is turned on, you should notice that it does not
  show Connection as a valid object with the ADOR type library, but does with
  the ADODB type library. This is a good indication that you do not have the
  correct type library referenced.

- This error can also occur when referencing objects in other type libraries
  that aren't referenced.

Additional query words:

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Keywords          : kbVBp500 kbVBp600 kbGrpDSVBDB kbGrpDSMDAC kbDSupport kbADO210sp2 kbMDAC210SP2 kbATM kbmdac270 
Technology        : kbVBSearch kbAudDeveloper kbADOsearch kbADO200 kbADO210sp2 kbADO250 kbADO260 kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVB600Search kbVB500 kbVB600 kbADO270
Version           : :2.0,2.1 SP2,2.5,2.6,5.0,6.0
Issue type        : kbprb

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