DOCUMENT:Q182152  11-JAN-2001  [vbwin]
TITLE   :FIX: StillExecuting Property Returns Incorrect Value
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:5.0
OPER/SYS:
KEYWORDS:kberrmsg kbVBp kbVBp500 kbVBp500bug kbVBp600fix kbGrpDSVB kbDSupport

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

 - Microsoft Visual Basic Professional Edition for Windows, version 5.0 
 - Microsoft Visual Basic Enterprise Edition for Windows, version 5.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

When attempting to compare the StillExecuting property with True, the comparison
may fail even though the Microsoft Internet Transfer control is still executing
its last Execute Method. This may result in the error:

   Run-time error 35764
   Still executing last request.

CAUSE
=====

When the Internet Transfer Control is executing, the StillExecuting property has
the incorrect value of 1 instead of the correct value of -1.

RESOLUTION
==========

Compare the StillExecuting property against a value other than False (0).

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This bug has been fixed in Visual Basic 6.0.

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

In Visual Basic, True equates to -1 and False equates to 0.

When the Internet Transfer Control is executing, comparing the StillExecuting
property with True fails. An alternative is to compare StillExecuting to any
value other than False (0).

When the Internet Transfer Control is not executing, the StillExecuting property
has the correct value of 0 (False).

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

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

2. Add the Microsoft Internet Transfer Control (Inet1) Form1.

3. Add a CommandButton (Command1) to Form1.

4. Insert the following code into the General Declarations section of Form1:

         Private Sub Command1_Click()
           Inet1.URL = "http://www.microsoft.com"
           Inet1.Execute , "GET"
           Do While Inet1.StillExecuting = True
             DoEvents
           Loop
           Inet1.Execute , "GET"
         End Sub

5. Run the program. When you click on Command1, you receive the error:

   Run-time error 35764
   Still executing last request.

To work around the problem, do not compare StillExecuting to True. Instead,
change the Do While condition to simply check for a non-zero value:

        Do While Inet1.StillExecuting

NOTE: This comparison will succeed where StillExecuting is 1, -1, or any value
other than 0 (False). If the value of StillExecuting is compared against an
explicit value such as 1, and this code is run with future versions of the
control where the bug is fixed, the comparison may fail.

REFERENCES
==========

Visual Basic 5.0 Help file topic: "Internet Transfer Control"

Additional query words:

======================================================================
Keywords          : kberrmsg kbVBp kbVBp500 kbVBp500bug kbVBp600fix kbGrpDSVB kbDSupport 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVBA500 kbVB500
Version           : WINDOWS:5.0
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.

Copyright Microsoft Corporation 2001.