ID Number: Q73656
1.00
WINDOWS
buglist1.00
Summary:
A Windows "Unrecoverable Application Error" (UAE) message will occur
if you terminate Microsoft Windows 3.0 under the following conditions:
1. A Visual Basic version 1.0 application is resident (running in the
background or foreground).
2. The Visual Basic application contains multiple forms.
3. The Unload event procedure of one form unloads another form.
4. The Visual Basic application is compiled and run as an .EXE program.
This problem does not occur when you run the program from the Visual
Basic development environment.
Microsoft has confirmed this problem in Microsoft Visual Basic
programming system version 1.0 for Windows. We are researching this
problem and will post new information here as it becomes available.
More Information:
Steps to Reproduce Problem
--------------------------
1. Start Visual Basic, and Form1 will automatically be created by
default. (If you already have a project loaded in the Visual Basic
environment, you can select New Project from the File menu
[ALT+F, N].)
2. From the File menu, choose New Form. This will create Form2.
3. Add the following code to Form1's Load event procedure:
Sub Form_Load ()
Form2.Show
End Sub
4. Add the following code to Form1's Unload event procedure:
Sub Form_Unload (Cancel As Integer)
Unload Form2
End Sub
5. From the File menu, choose Make EXE File (ALT+F, K) to create an
.EXE file.
6. From the Windows Program Manager's File menu, choose the Run
option, and run the Visual Basic .EXE program that you just
created.
7. Terminate Windows (ALT+F, X from the Windows Program Manager). The
Windows UAE message occurs. The computer may hang after you click on
the OK button of the UAE dialog box.
The UAE message incorrectly occurs because of the attempt to unload
Form2 from Form1's Unload event procedure. This is a known problem
when attempting to use the Unload method for one form from within the
Unload event procedure of another form.
To work around this problem, remove the Unload method from the Unload
event procedure or use the End statement in the Unload event procedure
instead.
Additional reference words: 1.00