FIX: Problems Shutting Down When Using the Inet Control

• Microsoft Visual Basic Control Creation, Learning, Professional, and Enterprise Editions for Windows, version 5.0

SYMPTOMS

The IDE and Visual Basic-created .exe files hang when shutting down if they have used the Internet Transfer Control in their project.

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 Studio 97 Service Pack 3.

For more information, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q170365
   TITLE     : INFO: Visual Studio 97 Service Packs - What, Where, and Why

   ARTICLE-ID: Q175450
   TITLE     : INFO: Visual Basic 5.0 Fixes in Visual Studio 97
               Service Pack 3

MORE INFORMATION

Steps to Reproduce Behavior

1. Start a new Standard EXE project. Form1 is created by default. Add the following code:

         Public Sub AddURL(ByVal sURL As String, _
            Optional ByVal sTitle As String = "", _
                    Optional ByVal sSize As String = "", _
                          Optional ByVal lSizeUnit As Long = 0)
            inetDownload.Execute sURL, "GET"
         End Sub
   
   

2. From the Project menu, click Components, and select the Internet Transfer Control 5.0 into the project if it is not already loaded.

3. Place an Internet Transfer Control 5.0 (Inet1) on Form1 and add the following code:

         Private Sub Inet1_StateChanged(ByVal State As Integer)
             Const lCHUNKSIZE As Long = 1024
             Dim vtData As Variant ' Data variable.
   
                Select Case State
                ' ... Other cases not shown.
                Case icError ' 11
                    ' In case of error, return ResponseCode and
   
               ' ResponseInfo.
                    vtData = Inet1.ResponseCode & ":" & _
                    Inet1.ResponseInfo
   
                Case icResponseCompleted  ' 12
                    Dim strData As String: strData = ""
                    Dim bDone As Boolean: bDone = False
   
                    ' Get first chunk.
                    vtData = Inet1.GetChunk(lCHUNKSIZE, icString)
                    DoEvents
   
                    Do While Not bDone
   
                        strData = strData & vtData
                        ' Get next chunk.
                        vtData = Inet1.GetChunk(lCHUNKSIZE, icString)
                        DoEvents
   
                        If Len(vtData) = 0 Then
                            bDone = True
                        End If
                    Loop
   
                 Case icDisconnected
                     Debug.Print "* Disconnected"
                     Unload Me
   
                End Select
   
         End Sub
   
   

4. Add another form to your project. By default, it will be called Form2. IMPORTANT: Make Form2 your startup form by changing the properties of the project. Add the following code:

         Private Sub Form_Load()
             Load form1
         End Sub
   
         Private Sub Form_Unload(Cancel As Integer)
             Unload form1
         End Sub
   
   

5. Place a CommandButton (Command1) on Form2 and add the following code:

         Private Sub Command1_Click()
            form1.AddURL "http://www.microsoft.com/default.htm"
         End Sub
   
   

6. From the Run menu, click Start (ALT, R, S), or press the F5 key to run the program. Click the Command1 button and you will see error described above.

Keywords          : vb5all VBKBAX VBKBAXInet VBKBComp VBKBCtrl VBKBInet VS97FixlistSP3 VB5FixListSP3
Technology        : kbInetDev
Version           : WINDOWS:5.0
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbfix kbservicepack