DOCUMENT:Q184200  20-APR-1998  [vbwin]
TITLE   :BUG: Error 405: "Can't Open a Modal Form in This Context"
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:5.0
OPER/SYS:WINDOWS
KEYWORDS:vb5all

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

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

SYMPTOMS
========

When opening a form from an ActiveX DLL, you may receive the following
error:

   Error 405: Can't Open a Modal Form in This Context.

CAUSE
=====

This error occurs when all of the following are true:

 - The computer is running Windows 95.

 - The ActiveX DLL has been compiled.

 - The client application is in the Visual Basic IDE.

 - The client application form has a BorderStyle property set to Dialog.

 - The ActiveX DLL form has been previously opened.

RESOLUTION
==========

Set the BorderStyle of the form in the client application to Fixed Single,
and remove the Min and Max buttons from the form. This results in the form
behaving in the same manner as a form with a Dialog BorderStyle.

STATUS
======

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

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

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

1. Create an ActiveX DLL in Visual Basic. Name the project "SrvDialog."
   Place the following code in Class1:

       Option Explicit
       Public Sub ShowDialog()
           Form2.Show 1
       End Sub

2. Add a form to the project. Change the Name and Caption properties to
   "Form2." Place the following code on Form2:

       Option Explicit
       Private Sub Form_Click()
           Unload Me
       End Sub

3. Compile the DLL.

4. Create a Standard EXE project in Visual Basic. Form1 is created by
   default. Make a reference to SrvDialog.DLL.

5. Change the BorderStyle property of Form1 to 3 (Fixed Dialog). Place a
   CommandButton on Form1, and place the following code on Form1:

       Option Explicit

       Private Sub Command1_Click()
       Dim x As New SrvDialog.Class1
          x.ShowDialog
          Set x = Nothing
       End Sub

6. Run the client application. Click Command1.

7. Click Form2 to unload that form.

8. Click Command1 again and note that Error 405 occurs.
======================================================================
Keywords          : vb5all
Version           : WINDOWS:5.0
Platform          : WINDOWS
Issue type        : kbbug

=============================================================================

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Copyright Microsoft Corporation 1998.