DOCUMENT:Q141680  11-JAN-2001  [vbwin]
TITLE   :BUG: Error Occurs When Printing a Form Stored in an Array
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:4.0
OPER/SYS:
KEYWORDS:kbnokeyword kbVBp kbVBp400bug kbGrpDSVB kbDSupport

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The information in this article applies to:

 - Microsoft Visual Basic Standard Edition, 32-bit, for Windows, version 4.0 
 - Microsoft Visual Basic Professional Edition, 16-bit, for Windows, version 4.0 
 - Microsoft Visual Basic Professional Edition, 32-bit, for Windows, version 4.0 
 - Microsoft Visual Basic Enterprise Edition, 16-bit, for Windows, version 4.0 
 - Microsoft Visual Basic Enterprise Edition, 32-bit, for Windows, version 4.0 
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SYMPTOMS
========

An application error occurs when calling the Print method of a form object
contained within a form array.

RESOLUTION
==========

To work around this problem, define a non-array form variable and set the
variable to reference the form array element that you want to manipulate. Once
this variable has been initialized, you can safely call the Print method of the
newly defined Form variable, as shown in the example below:

      Private Sub Form_Load()
      Dim MyForm As Form
        Dim fl(1) As Form2
        Set fl(0) = New Form2
        Set MyForm = fl(0)
        MyForm.Show  'Show the Form2 form
        MyForm.Print 'Print the form to the screen
      End Sub


STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. Microsoft is researching this problem and will post
new information here in the Microsoft Knowledge Base as it becomes available.

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

Steps to Reproduce Problem
--------------------------

1. Start Visual Basic 4.0 or if it is already running, click New Project on the
   File menu.

2. Copy the following code to the Code window of the Form1 form:

         Private Sub Form_Load()
            Dim fl(1) As Form2
            Set fl(0) = New Form2
            fl(0).Show  'Show the Form2 form
            fl(0).Print 'Print the form to the screen
         End Sub

3. On the Insert menu, click Form to insert a second form into the project.

4. On the Run menu, click start or press the F5 key to start the program. An
   application error occurs displaying one of the following messages and Visual
   Basic ends. The error occurs when the form array element's Print method is
   called.


   

      32-bit Visual Basic
         Windows NT 3.51-An application error has occurred and an
                         application error log is being generated.
                         VB32.exe. Exception illegal instructions
                         (0xc000001d), Address: (0x001818b3)

         Windows 95/98-VB32 executed an invalid instruction in module
                    <unknown> at 0000:00562eb3.

   

      16-bit Visual Basic under all operating systems
         VB caused a General Protection Fault in module VBA2.DLL at
         0009:87FD.

Additional query words:

======================================================================
Keywords          : kbnokeyword kbVBp kbVBp400bug kbGrpDSVB kbDSupport 
Technology        : kbVBSearch kbAudDeveloper kbVB400Search kbVB400 kbVB16bitSearch
Version           : WINDOWS:4.0
Issue type        : kbbug
Solution Type     : kbpending

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Copyright Microsoft Corporation 2001.