DOCUMENT:Q179913  29-JAN-1998  [vbwin]
TITLE   :PRB: Unexpected Behavior with Foxpro 2.x Database Using DBCombo
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:5.0
OPER/SYS:WINDOWS
KEYWORDS:vb5all

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The information in this article applies to:

 - Microsoft Visual Basic Enterprise Edition for Windows, version 5.0
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SYMPTOMS
========

When using the DBCombo control with a Foxpro 2.x type database the DBCombo
may begin an infinite scroll upward.

RESOLUTION
==========

To work around this problem, replaced the code in step 5 below with the
following code:

    Dim myBookMark as String

    Data1.Recordset.Index = "{Table Index Name}"
    Data1.Recordset.Seek "=", DBCombo1.Text

    myBookMark = Data1.Recordset.Bookmark
    Data1.Refresh

    Data1.Recordset.Bookmark = myBookMark
    DBCombo1.ReFill

STATUS
======

Microsoft is researching this problem and will post new information here in
the Microsoft Knowledge Base as it becomes available.

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

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

Before beginning, make sure that you have a Foxpro 2.x type table that has
an existing index on the field that will be displayed in the DBCombo
control.

1. Begin a new Standard Exe VB Project. Under the Project -> Components
   menu option, add a reference to "Microsoft Data Bound List Controls."

3. Add a new form to the project, and then add a Data Control and DBCombo
   control to the form.

4. Set the properties of the two controls to the following:

      Data Control:
                    Connect           = FoxPro 2.6;
                    DatabaseName      = {Path to the Foxpro Table}
                    DefaultCursorType = 0
                    DefaultType       = 2-UseJet
                    RecordSource      = {Table Name}
                    RecordsetType     = 0-Table

      DBCombo Control:
                    BoundColumn       = {Field From Table}
                    DataBindings      = Leave Blank
                    DataField         = Leave Blank
                    ListField         = {Field From Table}
                    RowSource         = Data1
                    Style             = 0-dbcDropDownCombo

5. In the DBCombo_Change subroutine, place the following code:

      Data1.Recordset.Index = "{Table Index Name}"
      Data1.Recordset.Seek "=", DBCombo1.BoundText

6. Run the project, click the DBCombo box. and change the selection so that
   the code behind the change event is executed. The first time this combo
   box is clicked, it behaves normally. Click the DBCombo control again and
   try to scroll upward through the list by holding down the mouse button.
   The DBCombo will begin an endless scrolling loop that never reaches the
   top of the list.

NOTE: In the above code, the text inside the {} must be replaced with the
appropriate information from the Foxpro table. This should be the name of
the field to display in the DBCombo control and the name of the index that
will be used to search on that field.
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Keywords          : vb5all
Component         : jet
Version           : WINDOWS:5.0
Platform          : WINDOWS
Issue type        : kbprb

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Copyright Microsoft Corporation 1998.