ACC: Resize Event Fires When Changing Form Focus

ID: Q155135

The information in this article applies to:

Microsoft Access versions 2.0, 7.0, 97

SYMPTOMS

Moderate: Requires basic macro, coding, and interoperability skills.

When you switch the focus away from a form in a Microsoft Access database, the Resize event fires unexpectedly for the form losing focus.

CAUSE

The form losing focus is maximized and you are changing focus to another maximized object. All multiple-document interface (MDI) objects that do not have focus are automatically restored to a windowed state behind the maximized MDI form that has focus. When the current form loses focus, Windows automatically restores it to a windowed state, causing the Resize event to occur.

STATUS

The Windows MDI behavior is by design.

MORE INFORMATION

The Resize event of a form fires whenever a change occurs that affects the size of a form:

When you first open a form

When you resize a form using the keyboard or mouse

When you maximize a form

When you minimize a form

When you switch focus away from a maximized form

Switching focus away from a maximized form is an additional issue that you must consider when developing custom code that uses the Resize event of a form.

Steps to Reproduce Behavior

Create a new database called Resize.mdb.

Create the following form:


      Form: Test1
      -----------------
      Caption: TestForm

Set the form's OnResize property to the following event procedure:


      Private Sub Form_Resize()
         MsgBox "The Resize Event Fired for " & Me.Name
      End Sub

Save the form as Test1 and close it.

Open the form in Form View and note that the following message box appears:
```
      The Resize Event Fired for Test1 
```

Press F11 to bring the database window into focus, then maximize the database window.

On the Window menu, click 2 TestForm to bring the Test1 form into focus. Notice that the following message box appears:
```
      The Resize Event Fired for Test1 
```

On the Window menu, click 1 Resize: Database (or 1 Database: Resize in version 2.0) to bring the main database window into focus. Notice that the following message box appears:
```
      The Resize Event Fired for Test1 
```
This occurs because Access is actually restoring the form to a windowed state as it places it behind the main database window.

REFERENCES

For more information about the behavior of maximized forms in Microsoft Access, please see the following articles in the Microsoft Knowledge Base:

Q147152 ACC: Maximizing One Form Maximizes All Forms (7.0/97)

Q121410 ACC: Maximizing One Form Maximizes All Forms

For more information about using custom form properties to expose the Maximize and Minimize status of forms in Microsoft Access 7.0 and 97 please see the following article in the Microsoft Knowledge Base:

Q141111 ACC: How to Determine If a Form Is Maximized or Minimized


Keywords          : FmsProb 
Version           : 2.0 7.0 97
Platform          : WINDOWS 
Issue type        : kbprb

Last Reviewed: April 28, 1999