KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q257710: FIX: PointSelected of MSChart May Return Wrong DataPoint Value

Article: Q257710
Product(s): Microsoft Visual Basic for Windows
Version(s): WINDOWS:6.0
Operating System(s): 
Keyword(s): kbCtrl kbVBp kbVBp600bug kbGrpDSVB kbDSupport kbVS600sp4fix kbVS600sp5fix
Last Modified: 27-JUL-2001

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

- Microsoft Visual Basic Professional Edition for Windows, version 6.0 
- Microsoft Visual Basic Enterprise Edition for Windows, version 6.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

If the control type of MSChart is set to Step chart, then the PointSelected
event does not always return the right DataPoint value.

STATUS
======

Microsoft has confirmed that this is a bug in the Microsoft products that are
listed at the beginning of this article. This bug was corrected in the latest
service pack for Visual Studio 6.0.

For additional information about Visual Studio service packs, click the following
article numbers to view the articles in the Microsoft Knowledge Base:

  Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

  Q194295 HOWTO: Tell That a Visual Studio Service Pack Is Installed

To download the latest Visual Studio service pack, visit the following Microsoft
Web site:

  http://msdn.microsoft.com/vstudio/downloads/updates.asp

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

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

1. Create a new Visual Basic Standard EXE project. Form1 is created by default.

2. From the Project menu, choose Components, check Microsoft Chart Control 6.0,
  and then click OK.

3. Place an MSChart control on Form1.

4. Paste the following code into Form1's code window:

  Option Explicit

  Private Sub Form_Load()
    Dim i As Integer, j As Integer
    Dim series As Integer, rows As Integer
    
    MSChart1.chartType = VtChChartType2dStep
    
    series = 2
    rows = 5
    
    With MSChart1.DataGrid
        .ColumnCount = series
        .RowCount = rows
        For i = 1 To series
            For j = 1 To rows
                .SetData j, i, j * i, 0
            Next j
        Next i
    End With
  End Sub

  Private Sub MSChart1_PointSelected(series As Integer, DataPoint As Integer, MouseFlags As Integer, Cancel As Integer)
    MsgBox "Column = " & series & " DataPoint = " & DataPoint
  End Sub

5. Press the F5 key to run the program. You should see two graphics plotted, one
  red and the other green.

6. Click on the last column (R5) on the green graphic to select it. Click again
  on the last column R5 (near level 9), and note that there is a message box
  displaying Column=2 and DataPoint=5. This means that you clicked on the
  second graphic (the green one) and the 5th point (in this case R5). This is
  the correct behavior.

7. Now click again on the green graphic and over R5, but this time near level 6.
  Note that the message box column is still 2 (correct), but DataPoint is 4.
  This is incorrect; it should be 5. This same problem occurs for R4, but not
  for R1 to R3.

Additional query words: sp4

======================================================================
Keywords          : kbCtrl kbVBp kbVBp600bug kbGrpDSVB kbDSupport kbVS600sp4fix kbVS600sp5fix 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB600Search kbVB600
Version           : WINDOWS:6.0
Issue type        : kbbug
Solution Type     : kbfix

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

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.