BUG: Events Occur in EXE While a Message Box Is Displayed

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

SYMPTOMS

Running a project in the IDE that displays a message box prevents events from occurring. However, when you compile and run the same project as an executable file (EXE), the events occur while the message box is displayed.

CAUSE

The behavior in the EXE is incorrect; events should not occur while a Message box is displayed (as with earlier versions of Microsoft Visual Basic).

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. Start a new Standard EXE project in Visual Basic. Form1 is created by default.

2. Add two CommandButtons and one Timer control to Form1.

3. Copy the following code to the Code window of Form1:

         Option Explicit
   

         Private Sub Form_Load()
            Timer1.Interval = 1000
            Command1.Caption = "Show Message Box"
            Command2.Caption = "Show Modal Form"
         End Sub
   
         Private Sub Command1_Click()
            MsgBox "Events Do Not Occur"
         End Sub
   
         Private Sub Command2_Click()
           Form2.Show vbModal
         End Sub
   
         Private Sub Timer1_Timer()
           Static intCount
            intCount = intCount + 1
            Form1.Print "Event # " & intCount
         End Sub
   
   

4. Add a second form to the Project by completing the following steps:

       - From the Project menu, click Add Form. The Add Form dialog box
         appears.
   

       - From the New Tab, click Form.
   

       - Click OK to close the Add Form dialog box. Form2 is added to the
         project.
   

5. On the Run menu, click Start or press the F5 key to start the program.

6. Click Show Message Box after two events occur. Note that the Timer event is no longer triggered.

7. Click Show Modal Form to display a modal form. Note that the events still occur even while the modal form is displayed.

8. Compile the project and run the executable file as shown in step 6. Note that the events still occur despite displaying the message box or form.