Q189808: PRB: UpDown Control May Not Increment As Expected

Article: Q189808
Product(s): Microsoft Visual Basic for Windows
Version(s): 
Operating System(s): 
Keyword(s): kbGrpDSVB
Last Modified: 11-JAN-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Visual Basic Learning Edition for Windows, versions 5.0, 6.0 
- Microsoft Visual Basic Professional Edition for Windows, versions 5.0, 6.0 
- Microsoft Visual Basic Enterprise Edition for Windows, versions 5.0, 6.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

When you click the up or down button on an UpDown control, you notice that the
value changes by more than the amount specified for the Increment property. For
example, if the Increment property is 2, the value of the UpDown control may
change by 3 instead of 2.

CAUSE
=====

When you click the up or down button to change the value of an UpDown control,
the control will first "normalize" the current value before it is changed by the
amount specified in the Increment property. By normalizing the value, the UpDown
control may change by more than the amount specified in the Increment property
so that the new value is evenly divisible by the Increment.

STATUS
======

This behavior is by design.

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

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

1. Start a new Standard EXE project. Form1 is created by default.

2. Choose Components from the Project menu, check "Microsoft Windows Common
  Controls-2" and click OK. The UpDown control should now be available on the
  Toolbox.

3. Add a Textbox control to Form1.

4. Add an UpDown control to Form1.

5. Set the properties of the UpDown1 control as follows:

        BuddyControl = Text1
        BuddyProperty = Text
        Increment = 2
        Max = 13
        Min = 3
        Value = 3

6. Add the following code to the Form1 module:

        Option Explicit

        Private Sub Form_Load()
           Text1.Text = UpDown1.Min
        End Sub

7. Run the project. Form1 appears.

8. Click once on the up arrow of the UpDown control. Although the Increment
  property is 2, the value of the UpDown control changes from 3 to 6 rather
  than 3 to 5.

Additional query words: kbDSupport kbDSD kbVBp kbVBp500 kbCtrl kbVBp600

======================================================================
Keywords          : kbGrpDSVB 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVB600Search kbVBA500 kbVBA600 kbVB500 kbVB600
Issue type        : kbprb

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 1986-2002.