FIX: IPF Opening or Saving Form with Tab Control

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

SYMPTOMS

Attempting to open or save a form containing an SSTab control may cause Visual Basic to terminate with one of the following errors:

   “VB5 caused an invalid page fault in module TABCTL32.OCX at
    0137:212fef0b”

 -or-

   “VB5 caused an invalid page fault in module OLEAUT32.DLL at
   0137:653468ec”

 -or-

   “VB5.exe Exception: Access violation (if using Windows NT)”

CAUSE

This problem can occur if the form (.frm file) contains incorrect information for the SSTab's child controls. This problem should only occur when the .frm file has been incorrectly edited outside of Visual Basic (such as with a text editor), or if the .frm file is otherwise corrupt.

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 2.

For more information on the Visual Studio 97 Service Pack 2, 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: Q171554
   TITLE     : INFO: Visual Basic 5.0 Fixes in Visual Studio 97
               Service Pack 2

MORE INFORMATION

Steps to Reproduce Behavior

1. Start a new "Standard EXE" project in Visual Basic 5.0.

2. Choose Components from the Project menu and select "Microsoft Tabbed Dialog Control 5.0."

3. Place an SSTab control on Form1.

4. Add two TextBox controls (Text1, Text2) to Tab 0.

5. Add two TextBox controls (Text3, Text4) to Tab 1.

6. Save the project (Form1.frm and Project1.vbp).

7. Exit Visual Basic.

8. Start Notepad and open Form1.frm.

9. Delete the following lines from Form1.frm:

         Tab(0).Control(1)=   "Text2"
         Tab(0).Control(1).Enabled=   0   'False
         ...
         Tab(1).Control(1)=   "Text4"
         Tab(1).Control(1).Enabled=   0   'False
         ...
         Begin VB.TextBox Text4
            Height          =   495
            Left            =   840
            TabIndex        =   4
            Text            =   "Text4"
            Top             =   1200
            Width           =   2775
         End
         ...
         Begin VB.TextBox Text2
            Height          =   495
            Left            =   -74160
            TabIndex        =   2
            Text            =   "Text2"
            Top             =   1200
            Width           =   2055
   
         End
   
   

10. Save Form1.frm and close Notepad.

11. Restart Visual Basic and open Project1.vbp. Note that an error occurs.