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Q257947: PRB: Runtime Error 7 : Out of Memory Error Message

Article: Q257947
Product(s): Microsoft Visual Basic for Windows
Version(s): 6.0,6.0 SP3,6.0 SP4
Operating System(s): 
Keyword(s): kbVBp600 kbGrpDSVBDB
Last Modified: 24-FEB-2001

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The information in this article applies to:

- Microsoft Visual Basic Enterprise Edition for Windows, versions 6.0, 6.0 SP3, 6.0 SP4 
- Microsoft Visual Basic Professional Edition for Windows, version 6.0 
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SYMPTOMS
========

If you try to access the BoundText property of a Data Combo control in Visual
Basic code after you scroll down the list of elements in its list portion until
the currently selected element is no longer visible in the list, the following
error message is displayed:

  Runtime Error '7': Out of Memory

CAUSE
=====

The cause of this behavior is unknown.

RESOLUTION
==========

Write code in the Click event of the Data Combo to store the value of the its
BoundText property in a form-level variable. Use the form-level variable to
access the value of the Data Combo's BoundText property.

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

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

The following steps reproduce this error:

1. Open a new Data project in Visual Basic. Drag-and-drop a Data Combo control,
  two ADO Data controls, and a CommandButton onto the form that is added to the
  project (frmDataEnv).

2. Set the Style property of the Data Combo to one of the following:

   - dbcDropdownCombo
   - dbcDropdownList

3. Set the ConnectionString property of the first ADO Data control (ADODC1) to
  connect to the Nwind.mdb database that is located in the Visual Basic 98
  folder. Specify the Products table in the Nwind.mdb database as its
  RecordSource.

4. Set the ConnectionString property of the second ADO Data control (ADODC2) to
  also connect to the Nwind.mdb database that is located in the Visual Basic 98
  folder. Specify the Suppliers table in the Nwind.mdb database as its
  RecordSource.

5. Set the following properties of the Data combo as specified below:

   - DataSource - ADODC1
   - DataField - SupplierID
   - RowSource - ADODC2
   - ListField - CompanyName
   - BoundColumn - SupplierID

6. Cut-and-paste the following line of code into the Click event of the
  CommandButton:

     MsgBox DataCombo1.BoundText

7. Save and run the Visual Basic project, and note that the Data Combo displays
  a List of CompanyNames from the Suppliers table.

8. Click the drop-down button on the Data Combo to display the list portion of
  the control, and then scroll down the list of items by using the vertical
  scroll bar until the currently selected element in the Data Combo is no
  longer visible in the elements that are displayed in the list portion of the
  control.

9. Click the CommandButton, and note that this collapses the list portion of the
  Data Combo control and generates the run-time error message noted in the
  "Summary" section of this article. Stop the execution of the project and
  return to the Visual Basic environment.

10. Declare a string variable by the name of BoundText in the form's General
  Declarations section. Cut-and-paste the following line of code in the Click
  event procedure of the Data Combo:

      BoundText = DataCombo1.BoundText

11. Modify the MsgBox statement in the Click event procedure of the Command
  Button to display the value of the BoundText variable instead of the
  BoundText property of the Data Combo.

12. Repeat steps 8 through 11, and note that the error message does not occur
  and that the value of the variable that is displayed reflects the value in
  the BoundText property of the Data Combo control.

Additional query words: DataGrid Runtime 7

======================================================================
Keywords          : kbVBp600 kbGrpDSVBDB 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB600Search kbVB600 kbVB600SP3 kbVB600SP4
Version           : :6.0,6.0 SP3,6.0 SP4
Issue type        : kbprb

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