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Microsoft KB Archive/171829

From BetaArchive Wiki

Article ID: 171829

Article Last Modified on 10/29/2003


  • Microsoft Visual Basic 5.0 Enterprise Edition, when used with:
    • the hardware: DEC Alpha

This article was previously published under Q171829


The GetChunk operation pauses unless other events are happening. Other events could include moving the mouse, which would trigger the GetChunk to continue.


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 Studio 97 Service Pack 2.

For more information on the Visual Studio Service Pack 2, please see the following article in the Microsoft Knowledge Base:

170365 : INFO: Visual Studio 97 Service Packs - What, Where, and Why

For a list of the Visual Basic 5.0 bugs that were fixed in the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base:

171554 : INFO: Visual Basic 5.0 Fixes in Visual Studio 97 Service Pack 2


Steps to Reproduce Behavior

  1. Run Visual Basic or, if Visual Basic is already running, choose New Project from the File menu (ALT, F, N). Form1 is created by default. Add the following code to the General Declarations of Form1:

          Option Explicit
          Private bwait As Boolean
  2. Place an Internet Transfer Control (Inet1) on Form1, and add the following code:

          Private Sub Inet1_StateChanged(ByVal State As Integer)
            Dim s$, t$
            Debug.Print "StateChanged:", State
            If State = icResponseCompleted Then
               t$ = ""
               s$ = Inet1.GetChunk(1024)
               While Len(s$) <> 0
                   t$ = t$ & s$
                   s$ = Inet1.GetChunk(1024)
                   DoEvents: DoEvents: DoEvents
                   Debug.Print ".";
               Debug.Print Left$(t$, 20), Len(t$)
               bwait = True
            End If
          End Sub
  3. Place a CommandButton (Command1) on Form1, and add the following code:

          Private Sub Command1_Click()
             Dim i As Integer
             Dim tmp As Single
             For i = 1 To 5
              tmp = Timer
              While tmp + 1 > Timer
                   DoEvents: DoEvents: DoEvents
              bwait = False
              Inet1.Execute "http://msw"
              While Not (bwait)
          End Sub
  4. Press the F5 key to run it, and then press the ENTER key to invoke the command_click. (NOTE: Do not move the mouse or touch the keyboard.)
  5. Watch your debug window. The first time you access the page, it works. However, the second time, you need to pause. Press Ctrl-break quickly and you are at the Doevents statement following the GetChunk. If you move the mouse, the GetChunk will continue.

Keywords: kbbug kbfix kbvbp500sp2fix kbvs97sp2fix KB171829