ACC: Maximized Form Shows Control Box, Min/Max/Restore Buttons

• Microsoft Access versions 2.0, 97

SYMPTOMS

Advanced: Requires expert coding, interoperability, and multiuser skills.

In Microsoft Access 97, a form whose ControlBox, MinMaxButtons, and CloseButton properties are set to No still displays the Restore and Close buttons when you maximize the form.

In Microsoft Access 2.0, a form whose ControlBox, MinButton, and MaxButton properties are set to No still displays the Control-menu box and a Restore button when you maximize the form.

This article assumes that you are familiar with Visual Basic for Applications and with creating Microsoft Access applications using the programming tools provided with Microsoft Access. For more information about Visual Basic for Applications, please refer to your version of the "Building Applications with Microsoft Access" manual.

NOTE: Visual Basic for Applications is called Access Basic in Microsoft Access version 2.0. For more information about Access Basic, please refer to the "Building Applications" manual.

CAUSE

Microsoft Access is a multiple document interface (MDI) application. The default behavior for an MDI application is for all maximized child windows to always display a Control-menu box and a Restore button.

RESOLUTION

You can use the following technique to simulate maximizing a window by sizing it as large as possible in the restored, windowed (non-maximized), state.

The following example demonstrates how to create and use a sample Sub procedure called MaximizeRestoredForm to restore a form if it is maximized, and then move it to the upper-left corner of the Microsoft Access client area window and size it as large as possible.

NOTE: This technique will produce a blank section at the top of the form that is approximately the height and width of a toolbar, if the form is opened in Design view, and then switched to Form view. This code works best when the form is opened from the Database window or through code while running the application.

NOTE: In the following sample code, an underscore (_) at the end of a line is used as a line-continuation character. Remove the underscore from the end of the line when re-creating this code in Access Basic.

1. Create a new module and type the following lines in the Declarations section:
   
   In Microsoft Access 97:

   
         Type Rect
            x1 As Long
            y1 As Long
            x2 As Long
            y2 As Long
         End Type
   
         Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Long, _
            lpRect As Rect) As Long
         Declare Function IsZoomed Lib "user32" (ByVal hwnd As Long) As Long
         Declare Function ShowWindow Lib "user32" (ByVal hwnd As Long, ByVal _
            nCmdShow As Long) As Long
         Declare Function MoveWindow Lib "user32" (ByVal hwnd As Long, ByVal _
            X As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight _
            As Long, ByVal bRepaint As Long) As Long
         Declare Function GetParent Lib "user32" (ByVal hwnd As Long) As Long
   
         Public Const SW_MAXIMIZE = 3
         Public Const SW_SHOWNORMAL = 1 

   In Microsoft Access 2.0:

   
         Option Explicit
   
         Type Rect
            x1 As Integer
            y1 As Integer
            x2 As Integer
            y2 As Integer
         End Type
   
         Declare Sub GetWindowRect Lib "User" (ByVal hWnd As Integer, _
            lpRect As Rect)
         Declare Function IsZoomed Lib "User" (ByVal hWnd As Integer) _
            As Integer
         Declare Sub ShowWindow Lib "User" (ByVal hWnd%, ByVal nCmdShow%)
         Declare Sub MoveWindow Lib "User" (ByVal hWnd As Integer, _
            ByVal X As Integer, ByVal Y As Integer, ByVal nWidth As _
            Integer, ByVal nHeight As Integer, ByVal bRepaint As Integer)
         Declare Function GetParent Lib "User" (ByVal hWnd As Integer) _
            As Integer
   
         Const SW_MAXIMIZE = 3
         Const SW_SHOWNORMAL = 1 




2. Type the following Sub procedure in the module:

   
         Sub MaximizeRestoredForm (F As Form)
            Dim MDIRect As Rect
   
            ' If the form is maximized, restore it.
            If IsZoomed(F.hWnd) <> 0 Then
               ShowWindow F.hWnd, SW_SHOWNORMAL
            End If
   
            ' Get the screen coordinates and window size of the
            ' MDIClient window.
            GetWindowRect GetParent(F.hWnd), MDIRect
   
               ' Move the form to the upper left corner of the MDIClient
               ' window (0,0) and size it to the same size as the
               ' MDIClient window.
               MoveWindow F.hWnd, 0, 0, MDIRect.x2 - MDIRect.x1, _
                  MDIRect.y2 - MDIRect.y1, True
         End Sub 




3. To simulate maximizing a form automatically when it is opened, set the OnLoad property of the form to the following event procedure:

   
         Sub Form_Load()
            MaximizeRestoredForm Me
         End Sub 




4. To simulate maximizing a form called MyForm, use the following statement in a function or subroutine:

   
         MaximizeRestoredForm Forms!MyForm 

STATUS

This behavior does not occur in Microsoft Access 7.0.

Additional query words:

Keywords : kbusage FmsProp
Version : WINDOWS:2.0,97
Platform : WINDOWS
Issue type : kbprb