Microsoft KB Archive/318992

= FIX: Fatal Exception Can Occur in Edit Box When You Use Microsoft Active Accessibility =

Article ID: 318992

Article Last Modified on 5/17/2002

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APPLIES TO


 * Microsoft Visual FoxPro 7.0 Professional Edition

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This article was previously published under Q318992



SYMPTOMS
When you use an edit box on a form, and you use the Accessible Event Watcher from the Microsoft Active Accessibility Software Development Kit (SDK),you may receive an error message that is similar to the following when you tab to the edit box, click the edit box with your mouse, or type in the edit box:

Fatal error: Exception code=C0000005 @ 02/27/2002 8:41:09 PM.

Error log file: C:\Program Files\Microsoft Visual FoxPro 7\vfp7err.log Called from - test line 5 {c:\test\test.prg c:\test\test.fxp}

This error may also occur with screen reader products that use Active Accessibility.



RESOLUTION
To resolve this problem, obtain the latest service pack for Visual FoxPro for Windows 7.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

316964 How to Obtain the Latest Visual FoxPro for Windows 7.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Microsoft Visual FoxPro for Windows 7.0.

This problem was first corrected in Visual FoxPro for Windows 7.0 Service Pack 1.



MORE INFORMATION
This can occur when you monitor the Value object property through Active Accessibility.

Steps to Reproduce the Behavior
 Download the following files from Microsoft Active Accessibility 2.0 SDK Tools (http://www.msdn.Microsoft.com/downloads/default.asp?URL=/downloads/sample.asp?url=/msdn-files/027/001/785/msdncompositedoc.xml), and then save them in the same folder:  Accevent32.exe Event32.dll

 Start Visual FoxPro 7.0. Make sure that the Properties window is closed. Run the Accessible Event Watcher (AccEvent32.exe) from the files that you downloaded.</li> On the Options menu in the Accessible Event Watcher, click Settings.</li> Under Object Properties, click Value, and then click OK.</li>  Paste the following code in a program (.prg) file, and then run the program from the Command window: CREATE CURSOR cjunk (f1 m) APPEND BLANK ox = CREATEOBJECT('frm1') ox.show READ EVENTS

DEFINE CLASS frm1 as Form showwindow = 2

ADD OBJECT text1 as textbox

ADD OBJECT edit1 as editbox WITH top = 50, ; controlsource = 'cjunk.f1' PROCEDURE init THISFORM.Text1.SetFocus ENDPROC PROCEDURE QUERYUNLOAD CLEAR EVENTS THISFORM.Release ENDPROC ENDDEFINE </li> Tab to the edit box, and then type any character. Note that you receive the error message that is described in the &quot;Symptoms&quot; section.</li></ol>

Keywords: kbbug kbfix kbvfp700sp1fix kbcodesnippet kbcontainer kbctrl KB318992

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